21544323122532 has 48 divisors (see below), whose sum is σ = 57451892803200. Its totient is φ = 6155481841152.

The previous prime is 21544323122527. The next prime is 21544323122551. The reversal of 21544323122532 is 23522132344512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14130178 + ... + 15580454.

It is an arithmetic number, because the mean of its divisors is an integer number (1196914433400).

Almost surely, 2^{21544323122532} is an apocalyptic number.

It is an amenable number.

21544323122532 is an abundant number, since it is smaller than the sum of its proper divisors (35907569680668).

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

21544323122532 is a wasteful number, since it uses less digits than its factorization.

21544323122532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627140 (or 1627138 counting only the distinct ones).

The product of its digits is 345600, while the sum is 39.

The spelling of 21544323122532 in words is "twenty-one trillion, five hundred forty-four billion, three hundred twenty-three million, one hundred twenty-two thousand, five hundred thirty-two".