18649314512 has 10 divisors (see below), whose sum is σ = 36133046898. Its totient is φ = 9324657248.

The previous prime is 18649314493. The next prime is 18649314533. The reversal of 18649314512 is 21541394681.

It can be written as a sum of positive squares in only one way, i.e., 13591829056 + 5057485456 = 116584^2 + 71116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582791063 + ... + 582791094.

Almost surely, 2^18649314512 is an apocalyptic number.

It is an amenable number.

18649314512 is a deficient number, since it is larger than the sum of its proper divisors (17483732386).

18649314512 is a wasteful number, since it uses less digits than its factorization.

18649314512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165582165 (or 1165582159 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The spelling of 18649314512 in words is "eighteen billion, six hundred forty-nine million, three hundred fourteen thousand, five hundred twelve".