21552672 has 48 divisors (see below), whose sum is σ = 56814912. Its totient is φ = 7153920.

The previous prime is 21552667. The next prime is 21552673. The reversal of 21552672 is 27625512.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (21552673) 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, 44013 + ... + 44499.

It is an arithmetic number, because the mean of its divisors is an integer number (1183644).

Almost surely, 2^21552672 is an apocalyptic number.

It is an amenable number.

21552672 is an abundant number, since it is smaller than the sum of its proper divisors (35262240).

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

21552672 is a wasteful number, since it uses less digits than its factorization.

21552672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 953 counting only the distinct ones).

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

The square root of 21552672 is about 4642.4855411730. The cubic root of 21552672 is about 278.2917765375.

The spelling of 21552672 in words is "twenty-one million, five hundred fifty-two thousand, six hundred seventy-two".