18223654423 has 16 divisors (see below), whose sum is σ = 20486592000. Its totient is φ = 16084293984.

The previous prime is 18223654399. The next prime is 18223654429. The reversal of 18223654423 is 32445632281.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18223654423 - 2⁵ = 18223654391 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 (18223654429) 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 15 ways as a sum of consecutive naturals, for example, 886540 + ... + 906862.

It is an arithmetic number, because the mean of its divisors is an integer number (1280412000).

Almost surely, 2^18223654423 is an apocalyptic number.

18223654423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18223654423 is a deficient number, since it is larger than the sum of its proper divisors (2262937577).

18223654423 is a wasteful number, since it uses less digits than its factorization.

18223654423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23358.

The product of its digits is 276480, while the sum is 40.

The spelling of 18223654423 in words is "eighteen billion, two hundred twenty-three million, six hundred fifty-four thousand, four hundred twenty-three".