18172144230 has 32 divisors (see below), whose sum is σ = 44676884448. Its totient is φ = 4727712000.

The previous prime is 18172144229. The next prime is 18172144241. The reversal of 18172144230 is 3244127181.

It is a junction number, because it is equal to n+sod(n) for n = 18172144191 and 18172144200.

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, 7385821 + ... + 7388280.

It is an arithmetic number, because the mean of its divisors is an integer number (1396152639).

Almost surely, 2^18172144230 is an apocalyptic number.

18172144230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18172144230 is an abundant number, since it is smaller than the sum of its proper divisors (26504740218).

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

18172144230 is a wasteful number, since it uses less digits than its factorization.

18172144230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14774152.

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 18172144230 in words is "eighteen billion, one hundred seventy-two million, one hundred forty-four thousand, two hundred thirty".