18639474514 has 8 divisors (see below), whose sum is σ = 27962173260. Its totient is φ = 9318750096.

The previous prime is 18639474481. The next prime is 18639474527. The reversal of 18639474514 is 41547493681.

It can be written as a sum of positive squares in 2 ways, for example, as 17826255225 + 813219289 = 133515^2 + 28517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 469749 + ... + 507880.

Almost surely, 2^18639474514 is an apocalyptic number.

18639474514 is a deficient number, since it is larger than the sum of its proper divisors (9322698746).

18639474514 is an equidigital number, since it uses as much as digits as its factorization.

18639474514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987164.

The product of its digits is 2903040, while the sum is 52.

The spelling of 18639474514 in words is "eighteen billion, six hundred thirty-nine million, four hundred seventy-four thousand, five hundred fourteen".