21944995 has 8 divisors (see below), whose sum is σ = 26382384. Its totient is φ = 17523744.

The previous prime is 21944987. The next prime is 21945017. The reversal of 21944995 is 59944912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21944995 - 2³ = 21944987 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (3297798).

Almost surely, 2^21944995 is an apocalyptic number.

21944995 is a deficient number, since it is larger than the sum of its proper divisors (4437389).

21944995 is an equidigital number, since it uses as much as digits as its factorization.

21944995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069.

The product of its digits is 116640, while the sum is 43.

The square root of 21944995 is about 4684.5485374794. The cubic root of 21944995 is about 279.9702136682.

The spelling of 21944995 in words is "twenty-one million, nine hundred forty-four thousand, nine hundred ninety-five".