21965675 has 12 divisors (see below), whose sum is σ = 27315216. Its totient is φ = 17522400.

The previous prime is 21965659. The next prime is 21965681. The reversal of 21965675 is 57656912.

It is not a de Polignac number, because 21965675 - 2⁴ = 21965659 is a prime.

It is a Duffinian 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, 9482 + ... + 11568.

It is an arithmetic number, because the mean of its divisors is an integer number (2276268).

Almost surely, 2^21965675 is an apocalyptic number.

21965675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21965675 is a deficient number, since it is larger than the sum of its proper divisors (5349541).

21965675 is a wasteful number, since it uses less digits than its factorization.

21965675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518 (or 2513 counting only the distinct ones).

The product of its digits is 113400, while the sum is 41.

The square root of 21965675 is about 4686.7552741742. The cubic root of 21965675 is about 280.0581299378.

The spelling of 21965675 in words is "twenty-one million, nine hundred sixty-five thousand, six hundred seventy-five".