18303471223 has 4 divisors (see below), whose sum is σ = 18304081200. Its totient is φ = 18302861248.

The previous prime is 18303471169. The next prime is 18303471233. The reversal of 18303471223 is 32217430381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32217430381 = 43 ⋅749242567.

It is a cyclic number.

It is not a de Polignac number, because 18303471223 - 2⁹ = 18303470711 is a prime.

It is a super-2 number, since 2×18303471223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18303471233) 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 3 ways as a sum of consecutive naturals, for example, 257515 + ... + 320812.

It is an arithmetic number, because the mean of its divisors is an integer number (4576020300).

Almost surely, 2^18303471223 is an apocalyptic number.

18303471223 is a deficient number, since it is larger than the sum of its proper divisors (609977).

18303471223 is an equidigital number, since it uses as much as digits as its factorization.

18303471223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609976.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 18303471223 in words is "eighteen billion, three hundred three million, four hundred seventy-one thousand, two hundred twenty-three".