21652632 has 96 divisors (see below), whose sum is σ = 61776000. Its totient is φ = 6842880.

The previous prime is 21652537. The next prime is 21652639. The reversal of 21652632 is 23625612.

21652632 is a `hidden beast` number, since 2 + 1 + 652 + 6 + 3 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21652596 and 21652605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652639) 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, 198594 + ... + 198702.

It is an arithmetic number, because the mean of its divisors is an integer number (643500).

Almost surely, 2^21652632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21652632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30888000).

21652632 is an abundant number, since it is smaller than the sum of its proper divisors (40123368).

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

21652632 is a wasteful number, since it uses less digits than its factorization.

21652632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 234 counting only the distinct ones).

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

The square root of 21652632 is about 4653.2388720116. The cubic root of 21652632 is about 278.7213466362.

It can be divided in two parts, 21 and 652632, that added together give a triangular number (652653 = T₁₁₄₂).

The spelling of 21652632 in words is "twenty-one million, six hundred fifty-two thousand, six hundred thirty-two".