19116494979 has 4 divisors (see below), whose sum is σ = 25488659976. Its totient is φ = 12744329984.

The previous prime is 19116494941. The next prime is 19116494987. The reversal of 19116494979 is 97949461191.

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

It is a cyclic number.

It is not a de Polignac number, because 19116494979 - 2⁸ = 19116494723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19116494939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3186082494 + ... + 3186082499.

It is an arithmetic number, because the mean of its divisors is an integer number (6372164994).

Almost surely, 2^19116494979 is an apocalyptic number.

19116494979 is a deficient number, since it is larger than the sum of its proper divisors (6372164997).

19116494979 is an equidigital number, since it uses as much as digits as its factorization.

19116494979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372164996.

The product of its digits is 4408992, while the sum is 60.

The spelling of 19116494979 in words is "nineteen billion, one hundred sixteen million, four hundred ninety-four thousand, nine hundred seventy-nine".