21632652 has 36 divisors (see below), whose sum is σ = 54938520. Its totient is φ = 7177152.

The previous prime is 21632651. The next prime is 21632657. The reversal of 21632652 is 25623612.

21632652 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 2 + 652 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (21632651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7099 + ... + 9677.

It is an arithmetic number, because the mean of its divisors is an integer number (1526070).

Almost surely, 2^21632652 is an apocalyptic number.

It is an amenable number.

21632652 is an abundant number, since it is smaller than the sum of its proper divisors (33305868).

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

21632652 is a wasteful number, since it uses less digits than its factorization.

21632652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822 (or 2817 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 21632652 is about 4651.0914848023. The cubic root of 21632652 is about 278.6355900674.

The spelling of 21632652 in words is "twenty-one million, six hundred thirty-two thousand, six hundred fifty-two".