18436113 has 8 divisors (see below), whose sum is σ = 27312800. Its totient is φ = 12290724.

The previous prime is 18436097. The next prime is 18436123. The reversal of 18436113 is 31163481.

18436113 is a `hidden beast` number, since 1 + 8 + 43 + 611 + 3 = 666.

It is not a de Polignac number, because 18436113 - 2⁴ = 18436097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 682819 = 18436113 / (1 + 8 + 4 + 3 + 6 + 1 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18436123) 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, 341383 + ... + 341436.

It is an arithmetic number, because the mean of its divisors is an integer number (3414100).

Almost surely, 2^18436113 is an apocalyptic number.

It is an amenable number.

18436113 is a deficient number, since it is larger than the sum of its proper divisors (8876687).

18436113 is an equidigital number, since it uses as much as digits as its factorization.

18436113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682828 (or 682822 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 18436113 is about 4293.7294977676. The cubic root of 18436113 is about 264.1738266372.

Adding to 18436113 its reverse (31163481), we get a palindrome (49599594).

The spelling of 18436113 in words is "eighteen million, four hundred thirty-six thousand, one hundred thirteen".