21960544 has 12 divisors (see below), whose sum is σ = 43234884. Its totient is φ = 10980256.

The previous prime is 21960539. The next prime is 21960551. The reversal of 21960544 is 44506912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343102 + ... + 343165.

It is an arithmetic number, because the mean of its divisors is an integer number (3602907).

Almost surely, 2^21960544 is an apocalyptic number.

It is an amenable number.

21960544 is a deficient number, since it is larger than the sum of its proper divisors (21274340).

21960544 is an equidigital number, since it uses as much as digits as its factorization.

21960544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686277 (or 686269 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 21960544 is about 4686.2078485701. The cubic root of 21960544 is about 280.0363218187.

The spelling of 21960544 in words is "twenty-one million, nine hundred sixty thousand, five hundred forty-four".