18494046819 has 32 divisors (see below), whose sum is σ = 29051136000. Its totient is φ = 11587761792.

The previous prime is 18494046817. The next prime is 18494046863. The reversal of 18494046819 is 91864049481.

It is a happy number.

18494046819 is a `hidden beast` number, since 1 + 84 + 94 + 0 + 468 + 19 = 666.

It is not a de Polignac number, because 18494046819 - 2¹ = 18494046817 is a prime.

It is a super-2 number, since 2×18494046819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18494046817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302002 + ... + 358040.

It is an arithmetic number, because the mean of its divisors is an integer number (907848000).

Almost surely, 2^18494046819 is an apocalyptic number.

18494046819 is a deficient number, since it is larger than the sum of its proper divisors (10557089181).

18494046819 is a wasteful number, since it uses less digits than its factorization.

18494046819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56784 (or 56778 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 18494046819 in words is "eighteen billion, four hundred ninety-four million, forty-six thousand, eight hundred nineteen".