22518748 has 48 divisors (see below), whose sum is σ = 47738880. Its totient is φ = 9085824.

The previous prime is 22518739. The next prime is 22518773. The reversal of 22518748 is 84781522.

It is a super-2 number, since 2×22518748² = 1014188022975008, which contains 22 as substring.

It is a congruent number.

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, 46773 + ... + 47251.

It is an arithmetic number, because the mean of its divisors is an integer number (994560).

Almost surely, 2^22518748 is an apocalyptic number.

22518748 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22518748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23869440).

22518748 is an abundant number, since it is smaller than the sum of its proper divisors (25220132).

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

22518748 is a wasteful number, since it uses less digits than its factorization.

22518748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 584 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 22518748 is about 4745.3922914760. The cubic root of 22518748 is about 282.3891982001.

The spelling of 22518748 in words is "twenty-two million, five hundred eighteen thousand, seven hundred forty-eight".