21164852 has 24 divisors (see below), whose sum is σ = 38228736. Its totient is φ = 10247328.

The previous prime is 21164849. The next prime is 21164863. The reversal of 21164852 is 25846112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18818 + ... + 19910.

It is an arithmetic number, because the mean of its divisors is an integer number (1592864).

Almost surely, 2^21164852 is an apocalyptic number.

It is an amenable number.

21164852 is a deficient number, since it is larger than the sum of its proper divisors (17063884).

21164852 is a wasteful number, since it uses less digits than its factorization.

21164852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1245 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 21164852 is about 4600.5273610750. The cubic root of 21164852 is about 276.6124640192.

The spelling of 21164852 in words is "twenty-one million, one hundred sixty-four thousand, eight hundred fifty-two".