21454952 has 64 divisors (see below), whose sum is σ = 46915200. Its totient is φ = 9149184.

The previous prime is 21454949. The next prime is 21454973. The reversal of 21454952 is 25945412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 932813 + ... + 932835.

It is an arithmetic number, because the mean of its divisors is an integer number (733050).

Almost surely, 2^21454952 is an apocalyptic number.

It is an amenable number.

21454952 is an abundant number, since it is smaller than the sum of its proper divisors (25460248).

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

21454952 is a wasteful number, since it uses less digits than its factorization.

21454952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 61 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 21454952 is about 4631.9490498061. The cubic root of 21454952 is about 277.8705468398.

The spelling of 21454952 in words is "twenty-one million, four hundred fifty-four thousand, nine hundred fifty-two".