21960944 has 10 divisors (see below), whose sum is σ = 42549360. Its totient is φ = 10980464.

The previous prime is 21960937. The next prime is 21960947. The reversal of 21960944 is 44906912.

It is a super-2 number, since 2×21960944² = 964566122742272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21960947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686264 + ... + 686295.

It is an arithmetic number, because the mean of its divisors is an integer number (4254936).

Almost surely, 2^21960944 is an apocalyptic number.

It is an amenable number.

21960944 is a deficient number, since it is larger than the sum of its proper divisors (20588416).

21960944 is a wasteful number, since it uses less digits than its factorization.

21960944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372567 (or 1372561 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 21960944 is about 4686.2505268071. The cubic root of 21960944 is about 280.0380220475.

The spelling of 21960944 in words is "twenty-one million, nine hundred sixty thousand, nine hundred forty-four".