21944675 has 12 divisors (see below), whose sum is σ = 27389616. Its totient is φ = 17440800.

The previous prime is 21944651. The next prime is 21944693. The reversal of 21944675 is 57644912.

It is not a de Polignac number, because 21944675 - 2¹⁶ = 21879139 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 1130 + ... + 6720.

It is an arithmetic number, because the mean of its divisors is an integer number (2282468).

Almost surely, 2^21944675 is an apocalyptic number.

21944675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21944675 is a deficient number, since it is larger than the sum of its proper divisors (5444941).

21944675 is a wasteful number, since it uses less digits than its factorization.

21944675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5758 (or 5753 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 21944675 is about 4684.5143825161. The cubic root of 21944675 is about 279.9688528278.

The spelling of 21944675 in words is "twenty-one million, nine hundred forty-four thousand, six hundred seventy-five".