21465052 has 12 divisors (see below), whose sum is σ = 42930160. Its totient is φ = 9199296.

The previous prime is 21465029. The next prime is 21465061. The reversal of 21465052 is 25056412.

21465052 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383277 + ... + 383332.

Almost surely, 2^21465052 is an apocalyptic number.

It is an amenable number.

21465052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21465052 is a wasteful number, since it uses less digits than its factorization.

21465052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766620 (or 766618 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 21465052 is about 4633.0391753146. The cubic root of 21465052 is about 277.9141428707.

The spelling of 21465052 in words is "twenty-one million, four hundred sixty-five thousand, fifty-two".