21162896522 has 16 divisors (see below), whose sum is σ = 33617219400. Its totient is φ = 9957362688.

The previous prime is 21162896507. The next prime is 21162896561. The reversal of 21162896522 is 22569826112.

It can be written as a sum of positive squares in 4 ways, for example, as 21036311521 + 126585001 = 145039^2 + 11251^2 .

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, 171008 + ... + 267524.

Almost surely, 2^21162896522 is an apocalyptic number.

21162896522 is a deficient number, since it is larger than the sum of its proper divisors (12454322878).

21162896522 is a wasteful number, since it uses less digits than its factorization.

21162896522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102985.

The product of its digits is 207360, while the sum is 44.

The spelling of 21162896522 in words is "twenty-one billion, one hundred sixty-two million, eight hundred ninety-six thousand, five hundred twenty-two".