18546157 has 6 divisors (see below), whose sum is σ = 21574158. Its totient is φ = 15896664.

The previous prime is 18546107. The next prime is 18546163. The reversal of 18546157 is 75164581.

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 729316 = 4221^2 + 854^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18546157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18546107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 189198 + ... + 189295.

It is an arithmetic number, because the mean of its divisors is an integer number (3595693).

Almost surely, 2^18546157 is an apocalyptic number.

It is an amenable number.

18546157 is a deficient number, since it is larger than the sum of its proper divisors (3028001).

18546157 is an equidigital number, since it uses as much as digits as its factorization.

18546157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378507 (or 378500 counting only the distinct ones).

The product of its digits is 33600, while the sum is 37.

The square root of 18546157 is about 4306.5249331683. The cubic root of 18546157 is about 264.6983966327.

The spelling of 18546157 in words is "eighteen million, five hundred forty-six thousand, one hundred fifty-seven".