18910134632 has 32 divisors (see below), whose sum is σ = 36769005000. Its totient is φ = 9106664448.

The previous prime is 18910134611. The next prime is 18910134673. The reversal of 18910134632 is 23643101981.

It can be written as a sum of positive squares in 4 ways, for example, as 17938316356 + 971818276 = 133934^2 + 31174^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4757 + ... + 194532.

Almost surely, 2^18910134632 is an apocalyptic number.

It is an amenable number.

18910134632 is a deficient number, since it is larger than the sum of its proper divisors (17858870368).

18910134632 is a wasteful number, since it uses less digits than its factorization.

18910134632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199733 (or 199729 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 18910134632 in words is "eighteen billion, nine hundred ten million, one hundred thirty-four thousand, six hundred thirty-two".