20398700885904 has 360 divisors, whose sum is σ = 63295873804800. Its totient is φ = 6081407424000.

The previous prime is 20398700885863. The next prime is 20398700885911. The reversal of 20398700885904 is 40958800789302.

20398700885904 is a `hidden beast` number, since 2 + 0 + 39 + 8 + 7 + 0 + 0 + 8 + 8 + 590 + 4 = 666.

It is a super-2 number, since 2×20398700885904² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4250612497 + ... + 4250617295.

It is an arithmetic number, because the mean of its divisors is an integer number (175821871680).

Almost surely, 2^{20398700885904} is an apocalyptic number.

20398700885904 is a gapful number since it is divisible by the number (24) 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 20398700885904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31647936902400).

20398700885904 is an abundant number, since it is smaller than the sum of its proper divisors (42897172918896).

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

20398700885904 is a wasteful number, since it uses less digits than its factorization.

20398700885904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251 (or 5079 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 20398700885904 in words is "twenty trillion, three hundred ninety-eight billion, seven hundred million, eight hundred eighty-five thousand, nine hundred four".