22643973 has 24 divisors (see below), whose sum is σ = 35982336. Its totient is φ = 13608000.

The previous prime is 22643969. The next prime is 22644019. The reversal of 22643973 is 37934622.

It is a happy number.

22643973 is a `hidden beast` number, since 2 + 2 + 643 + 9 + 7 + 3 = 666.

It is not a de Polignac number, because 22643973 - 2² = 22643969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11673 + ... + 13473.

It is an arithmetic number, because the mean of its divisors is an integer number (1499264).

Almost surely, 2^22643973 is an apocalyptic number.

It is an amenable number.

22643973 is a deficient number, since it is larger than the sum of its proper divisors (13338363).

22643973 is a wasteful number, since it uses less digits than its factorization.

22643973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1942 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 22643973 is about 4758.5683771487. The cubic root of 22643973 is about 282.9116789987.

The spelling of 22643973 in words is "twenty-two million, six hundred forty-three thousand, nine hundred seventy-three".