18870159 has 16 divisors (see below), whose sum is σ = 31368960. Its totient is φ = 9802560.

The previous prime is 18870151. The next prime is 18870161. The reversal of 18870159 is 95107881.

It is not a de Polignac number, because 18870159 - 2³ = 18870151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18870151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40614 + ... + 41075.

It is an arithmetic number, because the mean of its divisors is an integer number (1960560).

Almost surely, 2^18870159 is an apocalyptic number.

18870159 is a deficient number, since it is larger than the sum of its proper divisors (12498801).

18870159 is a wasteful number, since it uses less digits than its factorization.

18870159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81710.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 18870159 is about 4343.9796270240. The cubic root of 18870159 is about 266.2309365001.

The spelling of 18870159 in words is "eighteen million, eight hundred seventy thousand, one hundred fifty-nine".