21064152 has 32 divisors (see below), whose sum is σ = 53887680. Its totient is φ = 6857760.

The previous prime is 21064133. The next prime is 21064163. The reversal of 21064152 is 25146012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9174 + ... + 11237.

It is an arithmetic number, because the mean of its divisors is an integer number (1683990).

Almost surely, 2^21064152 is an apocalyptic number.

It is an amenable number.

21064152 is an abundant number, since it is smaller than the sum of its proper divisors (32823528).

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

21064152 is a wasteful number, since it uses less digits than its factorization.

21064152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20463 (or 20459 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 21064152 is about 4589.5699144909. The cubic root of 21064152 is about 276.1730693557.

The spelling of 21064152 in words is "twenty-one million, sixty-four thousand, one hundred fifty-two".