18137308 has 24 divisors (see below), whose sum is σ = 36892800. Its totient is φ = 7640688.

The previous prime is 18137303. The next prime is 18137311. The reversal of 18137308 is 80373181.

It is a self number, because there is not a number n which added to its sum of digits gives 18137308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18137303) 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, 3838 + ... + 7141.

It is an arithmetic number, because the mean of its divisors is an integer number (1537200).

Almost surely, 2^18137308 is an apocalyptic number.

It is an amenable number.

18137308 is an abundant number, since it is smaller than the sum of its proper divisors (18755492).

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

18137308 is a wasteful number, since it uses less digits than its factorization.

18137308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11049 (or 11047 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18137308 is about 4258.7918474610. The cubic root of 18137308 is about 262.7388387085.

The spelling of 18137308 in words is "eighteen million, one hundred thirty-seven thousand, three hundred eight".