19318309318 has 64 divisors (see below), whose sum is σ = 38071111680. Its totient is φ = 7122621600.

The previous prime is 19318309271. The next prime is 19318309321. The reversal of 19318309318 is 81390381391.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3107233 + ... + 3113443.

It is an arithmetic number, because the mean of its divisors is an integer number (594861120).

Almost surely, 2^19318309318 is an apocalyptic number.

19318309318 is a deficient number, since it is larger than the sum of its proper divisors (18752802362).

19318309318 is a wasteful number, since it uses less digits than its factorization.

19318309318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7313.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 19318309318 in words is "nineteen billion, three hundred eighteen million, three hundred nine thousand, three hundred eighteen".