21195852 has 48 divisors (see below), whose sum is σ = 51499392. Its totient is φ = 6779520.

The previous prime is 21195841. The next prime is 21195859. The reversal of 21195852 is 25859112.

It is not an unprimeable number, because it can be changed into a prime (21195859) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32643 + ... + 33285.

It is an arithmetic number, because the mean of its divisors is an integer number (1072904).

Almost surely, 2^21195852 is an apocalyptic number.

It is an amenable number.

21195852 is an abundant number, since it is smaller than the sum of its proper divisors (30303540).

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

21195852 is a wasteful number, since it uses less digits than its factorization.

21195852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 756 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

The square root of 21195852 is about 4603.8953072371. The cubic root of 21195852 is about 276.7474488707.

The spelling of 21195852 in words is "twenty-one million, one hundred ninety-five thousand, eight hundred fifty-two".