20501888855204 has 12 divisors (see below), whose sum is σ = 35878435705728. Its totient is φ = 10250907225000.

The previous prime is 20501888855197. The next prime is 20501888855249. The reversal of 20501888855204 is 40255888810502.

It is a happy number.

It is a super-2 number, since 2×20501888855204² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20501888855204.

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, 8041772 + ... + 10279779.

It is an arithmetic number, because the mean of its divisors is an integer number (2989869642144).

Almost surely, 2^{20501888855204} is an apocalyptic number.

It is an amenable number.

20501888855204 is a deficient number, since it is larger than the sum of its proper divisors (15376546850524).

20501888855204 is a wasteful number, since it uses less digits than its factorization.

20501888855204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18601306 (or 18601304 counting only the distinct ones).

The product of its (nonzero) digits is 8192000, while the sum is 56.

The spelling of 20501888855204 in words is "twenty trillion, five hundred one billion, eight hundred eighty-eight million, eight hundred fifty-five thousand, two hundred four".