18513341908 has 6 divisors (see below), whose sum is σ = 32398348346. Its totient is φ = 9256670952.

The previous prime is 18513341893. The next prime is 18513341911. The reversal of 18513341908 is 80914331581.

It can be written as a sum of positive squares in only one way, i.e., 18438380944 + 74960964 = 135788^2 + 8658^2 .

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, 2314167735 + ... + 2314167742.

Almost surely, 2^18513341908 is an apocalyptic number.

It is an amenable number.

18513341908 is a deficient number, since it is larger than the sum of its proper divisors (13885006438).

18513341908 is a wasteful number, since it uses less digits than its factorization.

18513341908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628335481 (or 4628335479 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 18513341908 in words is "eighteen billion, five hundred thirteen million, three hundred forty-one thousand, nine hundred eight".