18195919230 has 64 divisors (see below), whose sum is σ = 46688099328. Its totient is φ = 4522467840.

The previous prime is 18195919223. The next prime is 18195919253. The reversal of 18195919230 is 3291959181.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18195919230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120666 + ... + 225725.

It is an arithmetic number, because the mean of its divisors is an integer number (729501552).

Almost surely, 2^18195919230 is an apocalyptic number.

18195919230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18195919230 is an abundant number, since it is smaller than the sum of its proper divisors (28492180098).

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

18195919230 is a wasteful number, since it uses less digits than its factorization.

18195919230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346521.

The product of its (nonzero) digits is 174960, while the sum is 48.

The spelling of 18195919230 in words is "eighteen billion, one hundred ninety-five million, nine hundred nineteen thousand, two hundred thirty".