21532523304 has 16 divisors (see below), whose sum is σ = 53831308320. Its totient is φ = 7177507760.

The previous prime is 21532523273. The next prime is 21532523347. The reversal of 21532523304 is 40332523512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448594212 + ... + 448594259.

It is an arithmetic number, because the mean of its divisors is an integer number (3364456770).

Almost surely, 2^21532523304 is an apocalyptic number.

21532523304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21532523304 is an abundant number, since it is smaller than the sum of its proper divisors (32298785016).

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

21532523304 is a wasteful number, since it uses less digits than its factorization.

21532523304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897188480 (or 897188476 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 21532523304 in words is "twenty-one billion, five hundred thirty-two million, five hundred twenty-three thousand, three hundred four".