22993945 has 16 divisors (see below), whose sum is σ = 31464720. Its totient is φ = 15980544.

The previous prime is 22993939. The next prime is 22993961. The reversal of 22993945 is 54939922.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1390041 + 21603904 = 1179^2 + 4648^2 .

It is not a de Polignac number, because 22993945 - 2³ = 22993937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9300 + ... + 11509.

It is an arithmetic number, because the mean of its divisors is an integer number (1966545).

Almost surely, 2^22993945 is an apocalyptic number.

It is an amenable number.

22993945 is a deficient number, since it is larger than the sum of its proper divisors (8470775).

22993945 is a wasteful number, since it uses less digits than its factorization.

22993945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20844.

The product of its digits is 174960, while the sum is 43.

The square root of 22993945 is about 4795.2002043710. The cubic root of 22993945 is about 284.3617398317.

The spelling of 22993945 in words is "twenty-two million, nine hundred ninety-three thousand, nine hundred forty-five".