18604600159 has 4 divisors (see below), whose sum is σ = 18617013000. Its totient is φ = 18592187320.

The previous prime is 18604600141. The next prime is 18604600181. The reversal of 18604600159 is 95100640681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18604600159 - 2¹⁷ = 18604469087 is a prime.

It is a super-2 number, since 2×18604600159² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18604600129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6204172 + ... + 6207169.

It is an arithmetic number, because the mean of its divisors is an integer number (4654253250).

Almost surely, 2^18604600159 is an apocalyptic number.

18604600159 is a deficient number, since it is larger than the sum of its proper divisors (12412841).

18604600159 is a wasteful number, since it uses less digits than its factorization.

18604600159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12412840.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 18604600159 in words is "eighteen billion, six hundred four million, six hundred thousand, one hundred fifty-nine".