21164362 has 16 divisors (see below), whose sum is σ = 32778720. Its totient is φ = 10243728.

The previous prime is 21164357. The next prime is 21164401. The reversal of 21164362 is 26346112.

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, 6568 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (2048670).

Almost surely, 2^21164362 is an apocalyptic number.

21164362 is a deficient number, since it is larger than the sum of its proper divisors (11614358).

21164362 is a wasteful number, since it uses less digits than its factorization.

21164362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805.

The product of its digits is 1728, while the sum is 25.

The square root of 21164362 is about 4600.4741060026. The cubic root of 21164362 is about 276.6103293298.

The spelling of 21164362 in words is "twenty-one million, one hundred sixty-four thousand, three hundred sixty-two".