18123136 has 16 divisors (see below), whose sum is σ = 36104940. Its totient is φ = 9061504.

The previous prime is 18123113. The next prime is 18123143. The reversal of 18123136 is 63132181.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 18123136.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70666 + ... + 70921.

Almost surely, 2^18123136 is an apocalyptic number.

18123136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18123136 is a deficient number, since it is larger than the sum of its proper divisors (17981804).

18123136 is an equidigital number, since it uses as much as digits as its factorization.

18123136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141601 (or 141589 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 18123136 is about 4257.1276701551. The cubic root of 18123136 is about 262.6703885456.

The spelling of 18123136 in words is "eighteen million, one hundred twenty-three thousand, one hundred thirty-six".