18514157 has 2 divisors, whose sum is σ = 18514158. Its totient is φ = 18514156.

The previous prime is 18514127. The next prime is 18514159. The reversal of 18514157 is 75141581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9357481 + 9156676 = 3059^2 + 3026^2 .

It is a cyclic number.

It is not a de Polignac number, because 18514157 - 2¹⁰ = 18513133 is a prime.

Together with 18514159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18514159) 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 as a sum of consecutive naturals, namely, 9257078 + 9257079.

It is an arithmetic number, because the mean of its divisors is an integer number (9257079).

Almost surely, 2^18514157 is an apocalyptic number.

It is an amenable number.

18514157 is a deficient number, since it is larger than the sum of its proper divisors (1).

18514157 is an equidigital number, since it uses as much as digits as its factorization.

18514157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 32.

The square root of 18514157 is about 4302.8080366198. The cubic root of 18514157 is about 264.5460699266.

It can be divided in two parts, 1 and 8514157, that added together give a palindrome (8514158).

The spelling of 18514157 in words is "eighteen million, five hundred fourteen thousand, one hundred fifty-seven".