18608513 has 16 divisors (see below), whose sum is σ = 23553024. Its totient is φ = 14279760.

The previous prime is 18608509. The next prime is 18608533. The reversal of 18608513 is 31580681.

It is not a de Polignac number, because 18608513 - 2² = 18608509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18608513.

It is not an unprimeable number, because it can be changed into a prime (18608533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3356 + ... + 6962.

It is an arithmetic number, because the mean of its divisors is an integer number (1472064).

Almost surely, 2^18608513 is an apocalyptic number.

It is an amenable number.

18608513 is a deficient number, since it is larger than the sum of its proper divisors (4944511).

18608513 is a wasteful number, since it uses less digits than its factorization.

18608513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3692.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18608513 is about 4313.7585699712. The cubic root of 18608513 is about 264.9947216226.

The spelling of 18608513 in words is "eighteen million, six hundred eight thousand, five hundred thirteen".