18957159 has 48 divisors (see below), whose sum is σ = 32471712. Its totient is φ = 10948608.

The previous prime is 18957149. The next prime is 18957161. The reversal of 18957159 is 95175981.

It is not a de Polignac number, because 18957159 - 2¹⁹ = 18432871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18957119) 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 47 ways as a sum of consecutive naturals, for example, 53527 + ... + 53879.

It is an arithmetic number, because the mean of its divisors is an integer number (676494).

Almost surely, 2^18957159 is an apocalyptic number.

18957159 is the 2754-th heptagonal number.

18957159 is a deficient number, since it is larger than the sum of its proper divisors (13514553).

18957159 is a wasteful number, since it uses less digits than its factorization.

18957159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 386 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 18957159 is about 4353.9819705644. The cubic root of 18957159 is about 266.6394578142.

The spelling of 18957159 in words is "eighteen million, nine hundred fifty-seven thousand, one hundred fifty-nine".