20513255202400 has 36 divisors (see below), whose sum is σ = 50077984264812. Its totient is φ = 8205302080640.

The previous prime is 20513255202383. The next prime is 20513255202481. The reversal of 20513255202400 is 420255231502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12820783702 + ... + 12820785301.

It is an arithmetic number, because the mean of its divisors is an integer number (1391055118467).

Almost surely, 2^{20513255202400} is an apocalyptic number.

20513255202400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20513255202400 is an abundant number, since it is smaller than the sum of its proper divisors (29564729062412).

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

20513255202400 is a wasteful number, since it uses less digits than its factorization.

20513255202400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25641569023 (or 25641569010 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 20513255202400 in words is "twenty trillion, five hundred thirteen billion, two hundred fifty-five million, two hundred two thousand, four hundred".