21504176791010 has 16 divisors (see below), whose sum is σ = 38707588312056. Its totient is φ = 8601655141248.

The previous prime is 21504176791007. The next prime is 21504176791079. The reversal of 21504176791010 is 1019767140512.

It can be written as a sum of positive squares in 4 ways, for example, as 21009929828281 + 494246962729 = 4583659^2 + 703027^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5049014 + ... + 8276526.

Almost surely, 2^{21504176791010} is an apocalyptic number.

21504176791010 is a deficient number, since it is larger than the sum of its proper divisors (17203411521046).

21504176791010 is a wasteful number, since it uses less digits than its factorization.

21504176791010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893797.

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 21504176791010 in words is "twenty-one trillion, five hundred four billion, one hundred seventy-six million, seven hundred ninety-one thousand, ten".