21079903164441 has 32 divisors (see below), whose sum is σ = 30682645475328. Its totient is φ = 12766963971840.

The previous prime is 21079903164431. The next prime is 21079903164469. The reversal of 21079903164441 is 14446130997012.

It is not a de Polignac number, because 21079903164441 - 2⁶ = 21079903164377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21079903164431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 650136556 + ... + 650168978.

It is an arithmetic number, because the mean of its divisors is an integer number (958832671104).

Almost surely, 2^{21079903164441} is an apocalyptic number.

It is an amenable number.

21079903164441 is a deficient number, since it is larger than the sum of its proper divisors (9602742310887).

21079903164441 is a wasteful number, since it uses less digits than its factorization.

21079903164441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45301.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 21079903164441 in words is "twenty-one trillion, seventy-nine billion, nine hundred three million, one hundred sixty-four thousand, four hundred forty-one".