18513696 has 48 divisors (see below), whose sum is σ = 50174208. Its totient is φ = 5971200.

The previous prime is 18513659. The next prime is 18513701. The reversal of 18513696 is 69631581.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135 + ... + 6086.

It is an arithmetic number, because the mean of its divisors is an integer number (1045296).

Almost surely, 2^18513696 is an apocalyptic number.

18513696 is a gapful number since it is divisible by the number (16) 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 18513696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25087104).

18513696 is an abundant number, since it is smaller than the sum of its proper divisors (31660512).

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

18513696 is a wasteful number, since it uses less digits than its factorization.

18513696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6265 (or 6257 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 18513696 is about 4302.7544666179. The cubic root of 18513696 is about 264.5438741879.

The spelling of 18513696 in words is "eighteen million, five hundred thirteen thousand, six hundred ninety-six".