18423158444 has 12 divisors (see below), whose sum is σ = 32249107800. Its totient is φ = 9209127648.

The previous prime is 18423158443. The next prime is 18423158471. The reversal of 18423158444 is 44485132481.

It is a super-2 number, since 2×18423158444² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18423158395 and 18423158404.

It is not an unprimeable number, because it can be changed into a prime (18423158443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595934 + ... + 626085.

It is an arithmetic number, because the mean of its divisors is an integer number (2687425650).

Almost surely, 2^18423158444 is an apocalyptic number.

It is an amenable number.

18423158444 is a deficient number, since it is larger than the sum of its proper divisors (13825949356).

18423158444 is a wasteful number, since it uses less digits than its factorization.

18423158444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225792 (or 1225790 counting only the distinct ones).

The product of its digits is 491520, while the sum is 44.

The spelling of 18423158444 in words is "eighteen billion, four hundred twenty-three million, one hundred fifty-eight thousand, four hundred forty-four".