18947165159 has 8 divisors (see below), whose sum is σ = 21604912560. Its totient is φ = 16460885376.

The previous prime is 18947165089. The next prime is 18947165177. The reversal of 18947165159 is 95156174981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18947165159 - 2¹⁶ = 18947099623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18947165059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42866669 + ... + 42867110.

It is an arithmetic number, because the mean of its divisors is an integer number (2700614070).

Almost surely, 2^18947165159 is an apocalyptic number.

18947165159 is a deficient number, since it is larger than the sum of its proper divisors (2657747401).

18947165159 is a wasteful number, since it uses less digits than its factorization.

18947165159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85733809.

The product of its digits is 2721600, while the sum is 56.

The spelling of 18947165159 in words is "eighteen billion, nine hundred forty-seven million, one hundred sixty-five thousand, one hundred fifty-nine".