18974331119 has 2 divisors, whose sum is σ = 18974331120. Its totient is φ = 18974331118.

The previous prime is 18974331113. The next prime is 18974331199. The reversal of 18974331119 is 91113347981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18974331119 is a prime.

It is a super-2 number, since 2×18974331119² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18974331113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9487165559 + 9487165560.

It is an arithmetic number, because the mean of its divisors is an integer number (9487165560).

Almost surely, 2^18974331119 is an apocalyptic number.

18974331119 is a deficient number, since it is larger than the sum of its proper divisors (1).

18974331119 is an equidigital number, since it uses as much as digits as its factorization.

18974331119 is an evil number, because the sum of its binary digits is even.

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

The spelling of 18974331119 in words is "eighteen billion, nine hundred seventy-four million, three hundred thirty-one thousand, one hundred nineteen".