18739107819 has 24 divisors (see below), whose sum is σ = 27954253184. Its totient is φ = 12083904000.

The previous prime is 18739107817. The next prime is 18739107853. The reversal of 18739107819 is 91870193781.

18739107819 is a `hidden beast` number, since 187 + 391 + 0 + 78 + 1 + 9 = 666.

It is not a de Polignac number, because 18739107819 - 2¹ = 18739107817 is a prime.

It is a super-2 number, since 2×18739107819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18739107817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604539 + ... + 634779.

Almost surely, 2^18739107819 is an apocalyptic number.

18739107819 is a deficient number, since it is larger than the sum of its proper divisors (9215145365).

18739107819 is a wasteful number, since it uses less digits than its factorization.

18739107819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32499 (or 32496 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 54.

The spelling of 18739107819 in words is "eighteen billion, seven hundred thirty-nine million, one hundred seven thousand, eight hundred nineteen".