18641394632 has 16 divisors (see below), whose sum is σ = 39945845760. Its totient is φ = 7989169104.

The previous prime is 18641394617. The next prime is 18641394643. The reversal of 18641394632 is 23649314681.

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 3 ways as a sum of consecutive naturals, for example, 166440968 + ... + 166441079.

It is an arithmetic number, because the mean of its divisors is an integer number (2496615360).

Almost surely, 2^18641394632 is an apocalyptic number.

It is an amenable number.

18641394632 is an abundant number, since it is smaller than the sum of its proper divisors (21304451128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18641394632 is a wasteful number, since it uses less digits than its factorization.

18641394632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332882060 (or 332882056 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The spelling of 18641394632 in words is "eighteen billion, six hundred forty-one million, three hundred ninety-four thousand, six hundred thirty-two".