20680953504 has 24 divisors (see below), whose sum is σ = 54287503200. Its totient is φ = 6893651136.

The previous prime is 20680953497. The next prime is 20680953529. The reversal of 20680953504 is 40535908602.

It is a tau number, because it is divible by the number of its divisors (24).

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, 107713204 + ... + 107713395.

It is an arithmetic number, because the mean of its divisors is an integer number (2261979300).

Almost surely, 2^20680953504 is an apocalyptic number.

20680953504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20680953504 is an abundant number, since it is smaller than the sum of its proper divisors (33606549696).

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

20680953504 is a wasteful number, since it uses less digits than its factorization.

20680953504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215426612 (or 215426604 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 20680953504 in words is "twenty billion, six hundred eighty million, nine hundred fifty-three thousand, five hundred four".