18944451190 has 64 divisors (see below), whose sum is σ = 39643261056. Its totient is φ = 6383895552.

The previous prime is 18944451179. The next prime is 18944451191. The reversal of 18944451190 is 9115444981.

It is a happy number.

It is a super-2 number, since 2×18944451190² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18944451190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18944451191) 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 31 ways as a sum of consecutive naturals, for example, 1490904 + ... + 1503556.

It is an arithmetic number, because the mean of its divisors is an integer number (619425954).

Almost surely, 2^18944451190 is an apocalyptic number.

18944451190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18944451190 is an abundant number, since it is smaller than the sum of its proper divisors (20698809866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18944451190 is a wasteful number, since it uses less digits than its factorization.

18944451190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 18944451190 in words is "eighteen billion, nine hundred forty-four million, four hundred fifty-one thousand, one hundred ninety".