22497918 has 8 divisors (see below), whose sum is σ = 44995848. Its totient is φ = 7499304.

The previous prime is 22497911. The next prime is 22497931. The reversal of 22497918 is 81979422.

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

22497918 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 22497918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22497911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874821 + ... + 1874832.

It is an arithmetic number, because the mean of its divisors is an integer number (5624481).

Almost surely, 2^22497918 is an apocalyptic number.

22497918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22497918 is a wasteful number, since it uses less digits than its factorization.

22497918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3749658.

The product of its digits is 72576, while the sum is 42.

The square root of 22497918 is about 4743.1970231058. The cubic root of 22497918 is about 282.3021006757.

The spelling of 22497918 in words is "twenty-two million, four hundred ninety-seven thousand, nine hundred eighteen".