18444269194 has 32 divisors (see below), whose sum is σ = 30625446096. Its totient is φ = 8275737600.

The previous prime is 18444269191. The next prime is 18444269201. The reversal of 18444269194 is 49196244481.

It can be written as a sum of positive squares in 8 ways, for example, as 6546913569 + 11897355625 = 80913^2 + 109075^2 .

It is a super-2 number, since 2×18444269194² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18444269191) by changing a digit.

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, 1244194 + ... + 1258930.

Almost surely, 2^18444269194 is an apocalyptic number.

18444269194 is a deficient number, since it is larger than the sum of its proper divisors (12181176902).

18444269194 is a wasteful number, since it uses less digits than its factorization.

18444269194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16090.

The product of its digits is 1990656, while the sum is 52.

The spelling of 18444269194 in words is "eighteen billion, four hundred forty-four million, two hundred sixty-nine thousand, one hundred ninety-four".