22518774 has 12 divisors (see below), whose sum is σ = 48790716. Its totient is φ = 7506252.

The previous prime is 22518773. The next prime is 22518779. The reversal of 22518774 is 47781522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22518773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 625504 + ... + 625539.

It is an arithmetic number, because the mean of its divisors is an integer number (4065893).

Almost surely, 2^22518774 is an apocalyptic number.

22518774 is an abundant number, since it is smaller than the sum of its proper divisors (26271942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22518774 is a wasteful number, since it uses less digits than its factorization.

22518774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251051 (or 1251048 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 22518774 is about 4745.3950309748. The cubic root of 22518774 is about 282.3893068816.

It can be divided in two parts, 2251 and 8774, that added together give a square (11025 = 105²).

The spelling of 22518774 in words is "twenty-two million, five hundred eighteen thousand, seven hundred seventy-four".