21995652 has 48 divisors (see below), whose sum is σ = 58891392. Its totient is φ = 6259200.

The previous prime is 21995621. The next prime is 21995681. The reversal of 21995652 is 25659912.

It is a self number, because there is not a number n which added to its sum of digits gives 21995652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33358 + ... + 34010.

It is an arithmetic number, because the mean of its divisors is an integer number (1226904).

Almost surely, 2^21995652 is an apocalyptic number.

It is an amenable number.

21995652 is an abundant number, since it is smaller than the sum of its proper divisors (36895740).

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

21995652 is a wasteful number, since it uses less digits than its factorization.

21995652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1066 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 21995652 is about 4689.9522385628. The cubic root of 21995652 is about 280.1854723538.

The spelling of 21995652 in words is "twenty-one million, nine hundred ninety-five thousand, six hundred fifty-two".