21572652 has 24 divisors (see below), whose sum is σ = 51960832. Its totient is φ = 6958800.

The previous prime is 21572641. The next prime is 21572653. The reversal of 21572652 is 25627512.

It is not an unprimeable number, because it can be changed into a prime (21572653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28624 + ... + 29367.

Almost surely, 2^21572652 is an apocalyptic number.

It is an amenable number.

21572652 is an abundant number, since it is smaller than the sum of its proper divisors (30388180).

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

21572652 is a wasteful number, since it uses less digits than its factorization.

21572652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58029 (or 58027 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 21572652 is about 4644.6369072297. The cubic root of 21572652 is about 278.3777450337.

The spelling of 21572652 in words is "twenty-one million, five hundred seventy-two thousand, six hundred fifty-two".