18930171223 has 8 divisors (see below), whose sum is σ = 19335095792. Its totient is φ = 18528846336.

The previous prime is 18930171209. The next prime is 18930171289. The reversal of 18930171223 is 32217103981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18930171223 - 2⁵ = 18930171191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18930172223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 889290 + ... + 910327.

It is an arithmetic number, because the mean of its divisors is an integer number (2416886974).

Almost surely, 2^18930171223 is an apocalyptic number.

18930171223 is a deficient number, since it is larger than the sum of its proper divisors (404924569).

18930171223 is a wasteful number, since it uses less digits than its factorization.

18930171223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799841.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 18930171223 in words is "eighteen billion, nine hundred thirty million, one hundred seventy-one thousand, two hundred twenty-three".