18278945172934 has 8 divisors (see below), whose sum is σ = 27501252859368. Its totient is φ = 9111860886480.

The previous prime is 18278945172913. The next prime is 18278945172941. The reversal of 18278945172934 is 43927154987281.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13805849167 + ... + 13805850490.

It is an arithmetic number, because the mean of its divisors is an integer number (3437656607421).

Almost surely, 2^{18278945172934} is an apocalyptic number.

18278945172934 is a deficient number, since it is larger than the sum of its proper divisors (9222307686434).

18278945172934 is a wasteful number, since it uses less digits than its factorization.

18278945172934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27611699990.

The product of its digits is 243855360, while the sum is 70.

The spelling of 18278945172934 in words is "eighteen trillion, two hundred seventy-eight billion, nine hundred forty-five million, one hundred seventy-two thousand, nine hundred thirty-four".