21965614 has 24 divisors (see below), whose sum is σ = 36532440. Its totient is φ = 9897360.

The previous prime is 21965599. The next prime is 21965623. The reversal of 21965614 is 41656912.

It is a self number, because there is not a number n which added to its sum of digits gives 21965614.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33312 + ... + 33964.

It is an arithmetic number, because the mean of its divisors is an integer number (1522185).

Almost surely, 2^21965614 is an apocalyptic number.

21965614 is a deficient number, since it is larger than the sum of its proper divisors (14566826).

21965614 is a wasteful number, since it uses less digits than its factorization.

21965614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 805 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 21965614 is about 4686.7487664691. The cubic root of 21965614 is about 280.0578706915.

The spelling of 21965614 in words is "twenty-one million, nine hundred sixty-five thousand, six hundred fourteen".