22518836 has 6 divisors (see below), whose sum is σ = 39407970. Its totient is φ = 11259416.

The previous prime is 22518823. The next prime is 22518851. The reversal of 22518836 is 63881522.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 4080400 = 4294^2 + 2020^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22518796 and 22518805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2814851 + ... + 2814858.

It is an arithmetic number, because the mean of its divisors is an integer number (6567995).

Almost surely, 2^22518836 is an apocalyptic number.

It is an amenable number.

22518836 is a deficient number, since it is larger than the sum of its proper divisors (16889134).

22518836 is a wasteful number, since it uses less digits than its factorization.

22518836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5629713 (or 5629711 counting only the distinct ones).

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

The square root of 22518836 is about 4745.4015636192. The cubic root of 22518836 is about 282.3895660450.

The spelling of 22518836 in words is "twenty-two million, five hundred eighteen thousand, eight hundred thirty-six".