18509432676 has 72 divisors (see below), whose sum is σ = 50606823456. Its totient is φ = 5249784960.

The previous prime is 18509432659. The next prime is 18509432701. The reversal of 18509432676 is 67623490581.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34330 + ... + 195441.

It is an arithmetic number, because the mean of its divisors is an integer number (702872548).

It is a 1-persistent number, because it is pandigital, but 2⋅18509432676 = 37018865352 is not.

Almost surely, 2^18509432676 is an apocalyptic number.

It is an amenable number.

18509432676 is an abundant number, since it is smaller than the sum of its proper divisors (32097390780).

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

18509432676 is a wasteful number, since it uses less digits than its factorization.

18509432676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229929 (or 229920 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 18509432676 in words is "eighteen billion, five hundred nine million, four hundred thirty-two thousand, six hundred seventy-six".