21964048 has 40 divisors (see below), whose sum is σ = 44193600. Its totient is φ = 10568064.

The previous prime is 21964037. The next prime is 21964067. The reversal of 21964048 is 84046912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49813 + ... + 50251.

It is an arithmetic number, because the mean of its divisors is an integer number (1104840).

Almost surely, 2^21964048 is an apocalyptic number.

It is an amenable number.

21964048 is an abundant number, since it is smaller than the sum of its proper divisors (22229552).

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

21964048 is a wasteful number, since it uses less digits than its factorization.

21964048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 21964048 is about 4686.5816967167. The cubic root of 21964048 is about 280.0512151214.

The spelling of 21964048 in words is "twenty-one million, nine hundred sixty-four thousand, forty-eight".