22518873 has 24 divisors (see below), whose sum is σ = 35243208. Its totient is φ = 13773312.

The previous prime is 22518851. The next prime is 22518889. The reversal of 22518873 is 37881522.

It can be written as a sum of positive squares in 4 ways, for example, as 11209104 + 11309769 = 3348^2 + 3363^2 .

It is not a de Polignac number, because 22518873 - 2⁶ = 22518809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22518823) 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, 22561 + ... + 23537.

It is an arithmetic number, because the mean of its divisors is an integer number (1468467).

Almost surely, 2^22518873 is an apocalyptic number.

It is an amenable number.

22518873 is a deficient number, since it is larger than the sum of its proper divisors (12724335).

22518873 is a wasteful number, since it uses less digits than its factorization.

22518873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1190 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 22518873 is about 4745.4054621286. The cubic root of 22518873 is about 282.3897207067.

The spelling of 22518873 in words is "twenty-two million, five hundred eighteen thousand, eight hundred seventy-three".