21267270732 has 24 divisors (see below), whose sum is σ = 49636625472. Its totient is φ = 7087234000.

The previous prime is 21267270709. The next prime is 21267270749. The reversal of 21267270732 is 23707276212.

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, 183894 + ... + 276317.

It is an arithmetic number, because the mean of its divisors is an integer number (2068192728).

Almost surely, 2^21267270732 is an apocalyptic number.

It is an amenable number.

21267270732 is an abundant number, since it is smaller than the sum of its proper divisors (28369354740).

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

21267270732 is a wasteful number, since it uses less digits than its factorization.

21267270732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464069 (or 464067 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 39.

The spelling of 21267270732 in words is "twenty-one billion, two hundred sixty-seven million, two hundred seventy thousand, seven hundred thirty-two".