21372932 has 24 divisors (see below), whose sum is σ = 42878976. Its totient is φ = 9131328.

The previous prime is 21372889. The next prime is 21372937. The reversal of 21372932 is 23927312.

It is a junction number, because it is equal to n+sod(n) for n = 21372895 and 21372904.

It is not an unprimeable number, because it can be changed into a prime (21372937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9728 + ... + 11720.

It is an arithmetic number, because the mean of its divisors is an integer number (1786624).

Almost surely, 2^21372932 is an apocalyptic number.

It is an amenable number.

21372932 is an abundant number, since it is smaller than the sum of its proper divisors (21506044).

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

21372932 is a wasteful number, since it uses less digits than its factorization.

21372932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387 (or 2385 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 21372932 is about 4623.0868475511. The cubic root of 21372932 is about 277.5160048124.

The spelling of 21372932 in words is "twenty-one million, three hundred seventy-two thousand, nine hundred thirty-two".