21632650 has 48 divisors (see below), whose sum is σ = 45247104. Its totient is φ = 7634880.

The previous prime is 21632647. The next prime is 21632651. The reversal of 21632650 is 5623612.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 23 ways as a sum of consecutive naturals, for example, 14227 + ... + 15673.

It is an arithmetic number, because the mean of its divisors is an integer number (942648).

Almost surely, 2^21632650 is an apocalyptic number.

21632650 is an abundant number, since it is smaller than the sum of its proper divisors (23614454).

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

21632650 is a wasteful number, since it uses less digits than its factorization.

21632650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1490 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 21632650 is about 4651.0912697989. The cubic root of 21632650 is about 278.6355814805.

The spelling of 21632650 in words is "twenty-one million, six hundred thirty-two thousand, six hundred fifty".