21652995 has 64 divisors (see below), whose sum is σ = 44190720. Its totient is φ = 8805888.

The previous prime is 21652963. The next prime is 21652997. The reversal of 21652995 is 59925612.

It is not a de Polignac number, because 21652995 - 2⁵ = 21652963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (21652997) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39312 + ... + 39858.

It is an arithmetic number, because the mean of its divisors is an integer number (690480).

Almost surely, 2^21652995 is an apocalyptic number.

21652995 is an abundant number, since it is smaller than the sum of its proper divisors (22537725).

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

21652995 is a wasteful number, since it uses less digits than its factorization.

21652995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604.

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

The square root of 21652995 is about 4653.2778769379. The cubic root of 21652995 is about 278.7229041879.

The spelling of 21652995 in words is "twenty-one million, six hundred fifty-two thousand, nine hundred ninety-five".