22520018 has 8 divisors (see below), whose sum is σ = 34417548. Its totient is φ = 11047504.

The previous prime is 22519999. The next prime is 22520033. The reversal of 22520018 is 81002522.

It can be written as a sum of positive squares in 2 ways, for example, as 21967969 + 552049 = 4687^2 + 743^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106121 + ... + 106332.

Almost surely, 2^22520018 is an apocalyptic number.

22520018 is a deficient number, since it is larger than the sum of its proper divisors (11897530).

22520018 is a wasteful number, since it uses less digits than its factorization.

22520018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212508.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 22520018 is about 4745.5261036054. The cubic root of 22520018 is about 282.3945067773.

The spelling of 22520018 in words is "twenty-two million, five hundred twenty thousand, eighteen".