18739796635 has 16 divisors (see below), whose sum is σ = 25709875200. Its totient is φ = 12845354976.

The previous prime is 18739796633. The next prime is 18739796773. The reversal of 18739796635 is 53669793781.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18739796635 - 2¹ = 18739796633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18739796633) 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, 3295 + ... + 193624.

It is an arithmetic number, because the mean of its divisors is an integer number (1606867200).

Almost surely, 2^18739796635 is an apocalyptic number.

18739796635 is a deficient number, since it is larger than the sum of its proper divisors (6970078565).

18739796635 is a wasteful number, since it uses less digits than its factorization.

18739796635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199650.

The product of its digits is 51438240, while the sum is 64.

The spelling of 18739796635 in words is "eighteen billion, seven hundred thirty-nine million, seven hundred ninety-six thousand, six hundred thirty-five".