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20020220020 = 22510720994457
BaseRepresentation
bin10010101001010011…
…000101000001110100
31220200020120112220101
4102221103011001310
5312000134020040
613110330443444
71306056030253
oct225123050164
956606515811
1020020220020
11854398a689
123a68893584
131b70937248
14d7cc6a79a
157c291209a
hex4a94c5074

20020220020 has 48 divisors (see below), whose sum is σ = 42465124800. Its totient is φ = 7927687424.

The previous prime is 20020219931. The next prime is 20020220023. The reversal of 20020220020 is 2002202002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20020219979 and 20020220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020220023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4489632 + ... + 4494088.

It is an arithmetic number, because the mean of its divisors is an integer number (884690100).

Almost surely, 220020220020 is an apocalyptic number.

20020220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020220020 is an abundant number, since it is smaller than the sum of its proper divisors (22444904780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20020220020 is a wasteful number, since it uses less digits than its factorization.

20020220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672 (or 6670 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

Adding to 20020220020 its reverse (2002202002), we get a palindrome (22022422022).

The spelling of 20020220020 in words is "twenty billion, twenty million, two hundred twenty thousand, twenty".

Divisors: 1 2 4 5 10 20 107 214 428 535 1070 2099 2140 4198 4457 8396 8914 10495 17828 20990 22285 41980 44570 89140 224593 449186 476899 898372 953798 1122965 1907596 2245930 2384495 4491860 4768990 9355243 9537980 18710486 37420972 46776215 93552430 187104860 1001011001 2002022002 4004044004 5005055005 10010110010 20020220020