21082264 has 16 divisors (see below), whose sum is σ = 45176400. Its totient is φ = 9035232.

The previous prime is 21082253. The next prime is 21082277. The reversal of 21082264 is 46228012.

It is a happy 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, 188179 + ... + 188290.

It is an arithmetic number, because the mean of its divisors is an integer number (2823525).

Almost surely, 2^21082264 is an apocalyptic number.

It is an amenable number.

21082264 is an abundant number, since it is smaller than the sum of its proper divisors (24094136).

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

21082264 is a wasteful number, since it uses less digits than its factorization.

21082264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376482 (or 376478 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 21082264 is about 4591.5426601525. The cubic root of 21082264 is about 276.2522024353.

The spelling of 21082264 in words is "twenty-one million, eighty-two thousand, two hundred sixty-four".