20904793374976 has 81 divisors (see below), whose sum is σ = 48541839322431. Its totient is φ = 8958977696256.

The previous prime is 20904793374937. The next prime is 20904793374989. The reversal of 20904793374976 is 67947339740902.

The square root of 20904793374976 is 4572176.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 512063301 + ... + 512104123.

Almost surely, 2^{20904793374976} is an apocalyptic number.

20904793374976 is the 4572176-th square number.

It is an amenable number.

20904793374976 is an abundant number, since it is smaller than the sum of its proper divisors (27637045947455).

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

20904793374976 is an frugal number, since it uses more digits than its factorization.

20904793374976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81676 (or 40832 counting only the distinct ones).

The product of its (nonzero) digits is 432081216, while the sum is 70.

It can be divided in two parts, 20904793 and 374976, that added together give a square (21279769 = 4613²).

The spelling of 20904793374976 in words is "twenty trillion, nine hundred four billion, seven hundred ninety-three million, three hundred seventy-four thousand, nine hundred seventy-six".