16731963418 has 4 divisors (see below), whose sum is σ = 25097945130. Its totient is φ = 8365981708.

The previous prime is 16731963403. The next prime is 16731963509. The reversal of 16731963418 is 81436913761.

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

It can be written as a sum of positive squares in only one way, i.e., 14178379329 + 2553584089 = 119073^2 + 50533^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4182990853 + ... + 4182990856.

Almost surely, 2^16731963418 is an apocalyptic number.

16731963418 is a deficient number, since it is larger than the sum of its proper divisors (8365981712).

16731963418 is an equidigital number, since it uses as much as digits as its factorization.

16731963418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8365981711.

The product of its digits is 653184, while the sum is 49.

The spelling of 16731963418 in words is "sixteen billion, seven hundred thirty-one million, nine hundred sixty-three thousand, four hundred eighteen".