21904779233776 has 40 divisors (see below), whose sum is σ = 43251018369264. Its totient is φ = 10743319242240.

The previous prime is 21904779233759. The next prime is 21904779233851. The reversal of 21904779233776 is 67733297740912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857715 + ... + 6674221.

Almost surely, 2^{21904779233776} is an apocalyptic number.

It is an amenable number.

21904779233776 is a deficient number, since it is larger than the sum of its proper divisors (21346239135488).

21904779233776 is a wasteful number, since it uses less digits than its factorization.

21904779233776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5821009 (or 5821003 counting only the distinct ones).

The product of its (nonzero) digits is 168031584, while the sum is 67.

The spelling of 21904779233776 in words is "twenty-one trillion, nine hundred four billion, seven hundred seventy-nine million, two hundred thirty-three thousand, seven hundred seventy-six".