18037668 has 24 divisors (see below), whose sum is σ = 45914400. Its totient is φ = 5465920.

The previous prime is 18037667. The next prime is 18037699. The reversal of 18037668 is 86673081.

It is not an unprimeable number, because it can be changed into a prime (18037667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68193 + ... + 68456.

It is an arithmetic number, because the mean of its divisors is an integer number (1913100).

Almost surely, 2^18037668 is an apocalyptic number.

It is an amenable number.

18037668 is an abundant number, since it is smaller than the sum of its proper divisors (27876732).

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

18037668 is a wasteful number, since it uses less digits than its factorization.

18037668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136667 (or 136665 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 18037668 is about 4247.0775834684. The cubic root of 18037668 is about 262.2568233198.

The spelling of 18037668 in words is "eighteen million, thirty-seven thousand, six hundred sixty-eight".