18813363 has 16 divisors (see below), whose sum is σ = 26534400. Its totient is φ = 11823840.

The previous prime is 18813359. The next prime is 18813391. The reversal of 18813363 is 36331881.

It is a happy number.

It is not a de Polignac number, because 18813363 - 2² = 18813359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18813313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12933 + ... + 14313.

It is an arithmetic number, because the mean of its divisors is an integer number (1658400).

Almost surely, 2^18813363 is an apocalyptic number.

18813363 is a deficient number, since it is larger than the sum of its proper divisors (7721037).

18813363 is a wasteful number, since it uses less digits than its factorization.

18813363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642.

The product of its digits is 10368, while the sum is 33.

The square root of 18813363 is about 4337.4373770696. The cubic root of 18813363 is about 265.9635646479.

The spelling of 18813363 in words is "eighteen million, eight hundred thirteen thousand, three hundred sixty-three".