22518009423 has 32 divisors (see below), whose sum is σ = 41058483200. Its totient is φ = 11877630048.

The previous prime is 22518009389. The next prime is 22518009427. The reversal of 22518009423 is 32490081522.

It is a happy number.

22518009423 is a `hidden beast` number, since 225 + 1 + 8 + 0 + 0 + 9 + 423 = 666.

It is not a de Polignac number, because 22518009423 - 2⁹ = 22518008911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22518009427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4579963 + ... + 4584876.

It is an arithmetic number, because the mean of its divisors is an integer number (1283077600).

Almost surely, 2^22518009423 is an apocalyptic number.

22518009423 is a deficient number, since it is larger than the sum of its proper divisors (18540473777).

22518009423 is a wasteful number, since it uses less digits than its factorization.

22518009423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9164868 (or 9164862 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 22518009423 in words is "twenty-two billion, five hundred eighteen million, nine thousand, four hundred twenty-three".