22681538 has 32 divisors (see below), whose sum is σ = 39000960. Its totient is φ = 9797760.

The previous prime is 22681523. The next prime is 22681609. The reversal of 22681538 is 83518622.

It is a junction number, because it is equal to n+sod(n) for n = 22681498 and 22681507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46331 + ... + 46817.

It is an arithmetic number, because the mean of its divisors is an integer number (1218780).

Almost surely, 2^22681538 is an apocalyptic number.

22681538 is a deficient number, since it is larger than the sum of its proper divisors (16319422).

22681538 is a wasteful number, since it uses less digits than its factorization.

22681538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602.

The product of its digits is 23040, while the sum is 35.

The square root of 22681538 is about 4762.5138320009. The cubic root of 22681538 is about 283.0680370988.

The spelling of 22681538 in words is "twenty-two million, six hundred eighty-one thousand, five hundred thirty-eight".