22631018 has 4 divisors (see below), whose sum is σ = 33946530. Its totient is φ = 11315508.

The previous prime is 22631003. The next prime is 22631039. The reversal of 22631018 is 81013622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13126129 + 9504889 = 3623^2 + 3083^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22630984 and 22631002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5657753 + ... + 5657756.

Almost surely, 2^22631018 is an apocalyptic number.

22631018 is a deficient number, since it is larger than the sum of its proper divisors (11315512).

22631018 is a wasteful number, since it uses less digits than its factorization.

22631018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11315511.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 22631018 is about 4757.2069536651. The cubic root of 22631018 is about 282.8577158539.

The spelling of 22631018 in words is "twenty-two million, six hundred thirty-one thousand, eighteen".