16918323478 has 16 divisors (see below), whose sum is σ = 29017890720. Its totient is φ = 7246947456.

The previous prime is 16918323473. The next prime is 16918323479. The reversal of 16918323478 is 87432381961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16918323473) 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, 285523 + ... + 339646.

It is an arithmetic number, because the mean of its divisors is an integer number (1813618170).

Almost surely, 2^16918323478 is an apocalyptic number.

16918323478 is a deficient number, since it is larger than the sum of its proper divisors (12099567242).

16918323478 is a wasteful number, since it uses less digits than its factorization.

16918323478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627111.

The product of its digits is 1741824, while the sum is 52.

The spelling of 16918323478 in words is "sixteen billion, nine hundred eighteen million, three hundred twenty-three thousand, four hundred seventy-eight".