18308979378706 has 4 divisors (see below), whose sum is σ = 27463469068062. Its totient is φ = 9154489689352.

The previous prime is 18308979378619. The next prime is 18308979378757. The reversal of 18308979378706 is 60787397980381.

It is a happy number.

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., 9863939957481 + 8445039421225 = 3140691^2 + 2906035^2 .

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4577244844675 + ... + 4577244844678.

Almost surely, 2^{18308979378706} is an apocalyptic number.

18308979378706 is a deficient number, since it is larger than the sum of its proper divisors (9154489689356).

18308979378706 is an equidigital number, since it uses as much as digits as its factorization.

18308979378706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9154489689355.

The product of its (nonzero) digits is 768144384, while the sum is 76.

The spelling of 18308979378706 in words is "eighteen trillion, three hundred eight billion, nine hundred seventy-nine million, three hundred seventy-eight thousand, seven hundred six".