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20003122020 = 2235736789163
BaseRepresentation
bin10010101000010001…
…110110101101100100
31220122001101212212010
4102220101312231210
5311431244401040
613104520154220
71305460506000
oct225021665544
956561355763
1020003122020
118535271702
123a63008970
131b6a22b99b
14d7a899700
157c1185e80
hex4a8476b64

20003122020 has 384 divisors, whose sum is σ = 67447296000. Its totient is φ = 4425974784.

The previous prime is 20003121991. The next prime is 20003122021. The reversal of 20003122020 is 2022130002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20003121987 and 20003122005.

It is not an unprimeable number, because it can be changed into a prime (20003122021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 122718459 + ... + 122718621.

It is an arithmetic number, because the mean of its divisors is an integer number (175644000).

Almost surely, 220003122020 is an apocalyptic number.

20003122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20003122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33723648000).

20003122020 is an abundant number, since it is smaller than the sum of its proper divisors (47444173980).

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

20003122020 is a wasteful number, since it uses less digits than its factorization.

20003122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20003122020 its reverse (2022130002), we get a palindrome (22025252022).

The spelling of 20003122020 in words is "twenty billion, three million, one hundred twenty-two thousand, twenty".