21908852 has 24 divisors (see below), whose sum is σ = 46396224. Its totient is φ = 8836992.

The previous prime is 21908851. The next prime is 21908899. The reversal of 21908852 is 25880912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21908851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22538 + ... + 23489.

It is an arithmetic number, because the mean of its divisors is an integer number (1933176).

Almost surely, 2^21908852 is an apocalyptic number.

It is an amenable number.

21908852 is an abundant number, since it is smaller than the sum of its proper divisors (24487372).

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

21908852 is a wasteful number, since it uses less digits than its factorization.

21908852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46055 (or 46053 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 21908852 is about 4680.6892654822. The cubic root of 21908852 is about 279.8164272920.

The spelling of 21908852 in words is "twenty-one million, nine hundred eight thousand, eight hundred fifty-two".