18944451349 has 8 divisors (see below), whose sum is σ = 19421414208. Its totient is φ = 18468198240.

The previous prime is 18944451341. The next prime is 18944451367. The reversal of 18944451349 is 94315444981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18944451349 - 2³ = 18944451341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18944451296 and 18944451305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18944451341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123177 + ... + 230350.

It is an arithmetic number, because the mean of its divisors is an integer number (2427676776).

Almost surely, 2^18944451349 is an apocalyptic number.

It is an amenable number.

18944451349 is a deficient number, since it is larger than the sum of its proper divisors (476962859).

18944451349 is a wasteful number, since it uses less digits than its factorization.

18944451349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354875.

The product of its digits is 2488320, while the sum is 52.

The spelling of 18944451349 in words is "eighteen billion, nine hundred forty-four million, four hundred fifty-one thousand, three hundred forty-nine".