18936315 has 16 divisors (see below), whose sum is σ = 33664800. Its totient is φ = 10099296.

The previous prime is 18936311. The next prime is 18936343. The reversal of 18936315 is 51363981.

It is a happy number.

18936315 is a `hidden beast` number, since 18 + 9 + 3 + 631 + 5 = 666.

It is not a de Polignac number, because 18936315 - 2² = 18936311 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18936315.

It is not an unprimeable number, because it can be changed into a prime (18936311) 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, 70000 + ... + 70269.

It is an arithmetic number, because the mean of its divisors is an integer number (2104050).

Almost surely, 2^18936315 is an apocalyptic number.

18936315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18936315 is a deficient number, since it is larger than the sum of its proper divisors (14728485).

18936315 is a wasteful number, since it uses less digits than its factorization.

18936315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140283 (or 140277 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 18936315 is about 4351.5876413098. The cubic root of 18936315 is about 266.5416957830.

The spelling of 18936315 in words is "eighteen million, nine hundred thirty-six thousand, three hundred fifteen".