18036157 has 2 divisors, whose sum is σ = 18036158. Its totient is φ = 18036156.

The previous prime is 18036119. The next prime is 18036169. The reversal of 18036157 is 75163081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17799961 + 236196 = 4219^2 + 486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18036157 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18036457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9018078 + 9018079.

It is an arithmetic number, because the mean of its divisors is an integer number (9018079).

Almost surely, 2^18036157 is an apocalyptic number.

It is an amenable number.

18036157 is a deficient number, since it is larger than the sum of its proper divisors (1).

18036157 is an equidigital number, since it uses as much as digits as its factorization.

18036157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 18036157 is about 4246.8996927170. The cubic root of 18036157 is about 262.2495001055.

The spelling of 18036157 in words is "eighteen million, thirty-six thousand, one hundred fifty-seven".