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20020020220 = 2251001001011
BaseRepresentation
bin10010101001010010…
…010100001111111100
31220200020012101211101
4102221102110033330
5312000111121340
613110322302444
71306054235614
oct225122241774
956606171741
1020020020220
118543863562
123a687b7a24
131b70897315
14d7cc17a44
157c28c2c9a
hex4a94943fc

20020020220 has 12 divisors (see below), whose sum is σ = 42042042504. Its totient is φ = 8008008080.

The previous prime is 20020020191. The next prime is 20020020221. The reversal of 20020020220 is 2202002002.

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 = 20020020197 and 20020020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500500486 + ... + 500500525.

It is an arithmetic number, because the mean of its divisors is an integer number (3503503542).

Almost surely, 220020020220 is an apocalyptic number.

20020020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020020220 is an abundant number, since it is smaller than the sum of its proper divisors (22022022284).

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

20020020220 is a wasteful number, since it uses less digits than its factorization.

20020020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001001020 (or 1001001018 counting only the distinct ones).

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

Adding to 20020020220 its reverse (2202002002), we get a palindrome (22222022222).

The spelling of 20020020220 in words is "twenty billion, twenty million, twenty thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 1001001011 2002002022 4004004044 5005005055 10010010110 20020020220