18412718 has 4 divisors (see below), whose sum is σ = 27619080. Its totient is φ = 9206358.

The previous prime is 18412711. The next prime is 18412721. The reversal of 18412718 is 81721481.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18412711) 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 as a sum of consecutive naturals, namely, 4603178 + ... + 4603181.

It is an arithmetic number, because the mean of its divisors is an integer number (6904770).

Almost surely, 2^18412718 is an apocalyptic number.

18412718 is a deficient number, since it is larger than the sum of its proper divisors (9206362).

18412718 is an equidigital number, since it uses as much as digits as its factorization.

18412718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9206361.

The product of its digits is 3584, while the sum is 32.

The square root of 18412718 is about 4291.0043113472. The cubic root of 18412718 is about 264.0620358499.

The spelling of 18412718 in words is "eighteen million, four hundred twelve thousand, seven hundred eighteen".