18465157 has 2 divisors, whose sum is σ = 18465158. Its totient is φ = 18465156.

The previous prime is 18465151. The next prime is 18465163. The reversal of 18465157 is 75156481.

It is a balanced prime because it is at equal distance from previous prime (18465151) and next prime (18465163).

It can be written as a sum of positive squares in only one way, i.e., 10797796 + 7667361 = 3286^2 + 2769^2 .

It is a cyclic number.

It is not a de Polignac number, because 18465157 - 2¹⁵ = 18432389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18465151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9232578 + 9232579.

It is an arithmetic number, because the mean of its divisors is an integer number (9232579).

Almost surely, 2^18465157 is an apocalyptic number.

It is an amenable number.

18465157 is a deficient number, since it is larger than the sum of its proper divisors (1).

18465157 is an equidigital number, since it uses as much as digits as its factorization.

18465157 is an evil number, because the sum of its binary digits is even.

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

The square root of 18465157 is about 4297.1103081024. The cubic root of 18465157 is about 264.3124791287.

It can be divided in two parts, 184 and 65157, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 18465157 in words is "eighteen million, four hundred sixty-five thousand, one hundred fifty-seven".