21706552132 has 24 divisors (see below), whose sum is σ = 38055680600. Its totient is φ = 10833523200.

The previous prime is 21706552099. The next prime is 21706552159. The reversal of 21706552132 is 23125560712.

It can be written as a sum of positive squares in 4 ways, for example, as 2048829696 + 19657722436 = 45264^2 + 140206^2 .

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, 7439938 + ... + 7442854.

Almost surely, 2^21706552132 is an apocalyptic number.

It is an amenable number.

21706552132 is a deficient number, since it is larger than the sum of its proper divisors (16349128468).

21706552132 is a wasteful number, since it uses less digits than its factorization.

21706552132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671 (or 5669 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 21706552132 in words is "twenty-one billion, seven hundred six million, five hundred fifty-two thousand, one hundred thirty-two".