18785683474 has 16 divisors (see below), whose sum is σ = 28716738840. Its totient is φ = 9213518080.

The previous prime is 18785683447. The next prime is 18785683487. The reversal of 18785683474 is 47438658781.

It can be written as a sum of positive squares in 4 ways, for example, as 18661472449 + 124211025 = 136607^2 + 11145^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513264 + ... + 548644.

Almost surely, 2^18785683474 is an apocalyptic number.

18785683474 is a deficient number, since it is larger than the sum of its proper divisors (9931055366).

18785683474 is a wasteful number, since it uses less digits than its factorization.

18785683474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40445.

The product of its digits is 36126720, while the sum is 61.

The spelling of 18785683474 in words is "eighteen billion, seven hundred eighty-five million, six hundred eighty-three thousand, four hundred seventy-four".