21530322108 has 36 divisors (see below), whose sum is σ = 54431191360. Its totient is φ = 7175808576.

The previous prime is 21530322053. The next prime is 21530322113. The reversal of 21530322108 is 80122303512.

21530322108 is a `hidden beast` number, since 2 + 1 + 530 + 3 + 22 + 108 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262248 + ... + 334416.

Almost surely, 2^21530322108 is an apocalyptic number.

It is an amenable number.

21530322108 is an abundant number, since it is smaller than the sum of its proper divisors (32900869252).

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

21530322108 is a wasteful number, since it uses less digits than its factorization.

21530322108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80466 (or 80461 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 21530322108 in words is "twenty-one billion, five hundred thirty million, three hundred twenty-two thousand, one hundred eight".