18944219044 has 9 divisors (see below), whose sum is σ = 33152865067. Its totient is φ = 9471971884.

The previous prime is 18944219017. The next prime is 18944219051. The reversal of 18944219044 is 44091244981.

The square root of 18944219044 is 137638.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18944218985 and 18944219003.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 240867 + ... + 309685.

Almost surely, 2^18944219044 is an apocalyptic number.

18944219044 is the 137638-th square number.

It is an amenable number.

18944219044 is a deficient number, since it is larger than the sum of its proper divisors (14208646023).

18944219044 is an frugal number, since it uses more digits than its factorization.

18944219044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137642 (or 68821 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 18944219044 in words is "eighteen billion, nine hundred forty-four million, two hundred nineteen thousand, forty-four".