18995139230 has 32 divisors (see below), whose sum is σ = 36141465600. Its totient is φ = 7168023072.

The previous prime is 18995139223. The next prime is 18995139257. The reversal of 18995139230 is 3293159981.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 163742 + ... + 254561.

It is an arithmetic number, because the mean of its divisors is an integer number (1129420800).

Almost surely, 2^18995139230 is an apocalyptic number.

18995139230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18995139230 is a deficient number, since it is larger than the sum of its proper divisors (17146326370).

18995139230 is a wasteful number, since it uses less digits than its factorization.

18995139230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418568.

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 18995139230 in words is "eighteen billion, nine hundred ninety-five million, one hundred thirty-nine thousand, two hundred thirty".