21524521134 has 32 divisors (see below), whose sum is σ = 45613545120. Its totient is φ = 6748019712.

The previous prime is 21524521097. The next prime is 21524521153. The reversal of 21524521134 is 43112542512.

It is a congruent number.

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, 71922 + ... + 219594.

It is an arithmetic number, because the mean of its divisors is an integer number (1425423285).

Almost surely, 2^21524521134 is an apocalyptic number.

21524521134 is an abundant number, since it is smaller than the sum of its proper divisors (24089023986).

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

21524521134 is a wasteful number, since it uses less digits than its factorization.

21524521134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149124.

The product of its digits is 9600, while the sum is 30.

The spelling of 21524521134 in words is "twenty-one billion, five hundred twenty-four million, five hundred twenty-one thousand, one hundred thirty-four".