18118757 has 4 divisors (see below), whose sum is σ = 18189516. Its totient is φ = 18048000.

The previous prime is 18118721. The next prime is 18118777. The reversal of 18118757 is 75781181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75781181 = 7 ⋅10825883.

It can be written as a sum of positive squares in 2 ways, for example, as 16048036 + 2070721 = 4006^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 18118757 - 2⁸ = 18118501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18118757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18118717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34994 + ... + 35507.

It is an arithmetic number, because the mean of its divisors is an integer number (4547379).

Almost surely, 2^18118757 is an apocalyptic number.

It is an amenable number.

18118757 is a deficient number, since it is larger than the sum of its proper divisors (70759).

18118757 is an equidigital number, since it uses as much as digits as its factorization.

18118757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70758.

The product of its digits is 15680, while the sum is 38.

The square root of 18118757 is about 4256.6133251683. The cubic root of 18118757 is about 262.6492309437.

The spelling of 18118757 in words is "eighteen million, one hundred eighteen thousand, seven hundred fifty-seven".