18499783615 has 16 divisors (see below), whose sum is σ = 22367374848. Its totient is φ = 14688327456.

The previous prime is 18499783609. The next prime is 18499783619. The reversal of 18499783615 is 51638799481.

It is a cyclic number.

It is not a de Polignac number, because 18499783615 - 2⁷ = 18499783487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18499783619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576894 + ... + 608116.

It is an arithmetic number, because the mean of its divisors is an integer number (1397960928).

Almost surely, 2^18499783615 is an apocalyptic number.

18499783615 is a deficient number, since it is larger than the sum of its proper divisors (3867591233).

18499783615 is a wasteful number, since it uses less digits than its factorization.

18499783615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32118.

The product of its digits is 13063680, while the sum is 61.

The spelling of 18499783615 in words is "eighteen billion, four hundred ninety-nine million, seven hundred eighty-three thousand, six hundred fifteen".