18147568 has 40 divisors (see below), whose sum is σ = 37577952. Its totient is φ = 8460288.

The previous prime is 18147559. The next prime is 18147583. The reversal of 18147568 is 86574181.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18147568.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37021 + ... + 37507.

Almost surely, 2^18147568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18147568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18788976).

18147568 is an abundant number, since it is smaller than the sum of its proper divisors (19430384).

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

18147568 is a wasteful number, since it uses less digits than its factorization.

18147568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 643 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 18147568 is about 4259.9962441298. The cubic root of 18147568 is about 262.7883718281.

The spelling of 18147568 in words is "eighteen million, one hundred forty-seven thousand, five hundred sixty-eight".