21459952 has 40 divisors (see below), whose sum is σ = 42854400. Its totient is φ = 10406592.

The previous prime is 21459941. The next prime is 21459973. The reversal of 21459952 is 25995412.

It is a congruent number.

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, 119799 + ... + 119977.

It is an arithmetic number, because the mean of its divisors is an integer number (1071360).

Almost surely, 2^21459952 is an apocalyptic number.

It is an amenable number.

21459952 is a deficient number, since it is larger than the sum of its proper divisors (21394448).

21459952 is a wasteful number, since it uses less digits than its factorization.

21459952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 367 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 21459952 is about 4632.4887479626. The cubic root of 21459952 is about 277.8921307430.

The spelling of 21459952 in words is "twenty-one million, four hundred fifty-nine thousand, nine hundred fifty-two".