20400051564904 has 16 divisors (see below), whose sum is σ = 41727378201120. Its totient is φ = 9272750711280.

The previous prime is 20400051564883. The next prime is 20400051564943. The reversal of 20400051564904 is 40946515000402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115909383804 + ... + 115909383979.

It is an arithmetic number, because the mean of its divisors is an integer number (2607961137570).

Almost surely, 2^{20400051564904} is an apocalyptic number.

It is an amenable number.

20400051564904 is an abundant number, since it is smaller than the sum of its proper divisors (21327326636216).

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

20400051564904 is a wasteful number, since it uses less digits than its factorization.

20400051564904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231818767800 (or 231818767796 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 20400051564904 in words is "twenty trillion, four hundred billion, fifty-one million, five hundred sixty-four thousand, nine hundred four".