18794311319 has 4 divisors (see below), whose sum is σ = 21479212944. Its totient is φ = 16109409696.

The previous prime is 18794311297. The next prime is 18794311337. The reversal of 18794311319 is 91311349781.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91311349781 = 4657 ⋅19607333.

It is a cyclic number.

It is not a de Polignac number, because 18794311319 - 2¹² = 18794307223 is a prime.

It is a super-2 number, since 2×18794311319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18794311369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1342450802 + ... + 1342450815.

It is an arithmetic number, because the mean of its divisors is an integer number (5369803236).

Almost surely, 2^18794311319 is an apocalyptic number.

18794311319 is a deficient number, since it is larger than the sum of its proper divisors (2684901625).

18794311319 is an equidigital number, since it uses as much as digits as its factorization.

18794311319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684901624.

The product of its digits is 163296, while the sum is 47.

The spelling of 18794311319 in words is "eighteen billion, seven hundred ninety-four million, three hundred eleven thousand, three hundred nineteen".