18774084536 has 16 divisors (see below), whose sum is σ = 35203767000. Its totient is φ = 9386413344.

The previous prime is 18774084421. The next prime is 18774084559. The reversal of 18774084536 is 63548047781.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63326 + ... + 203858.

Almost surely, 2^18774084536 is an apocalyptic number.

It is an amenable number.

18774084536 is a deficient number, since it is larger than the sum of its proper divisors (16429682464).

18774084536 is a wasteful number, since it uses less digits than its factorization.

18774084536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157238 (or 157234 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 18774084536 in words is "eighteen billion, seven hundred seventy-four million, eighty-four thousand, five hundred thirty-six".