18919410944 has 36 divisors (see below), whose sum is σ = 43159910304. Its totient is φ = 8108318208.

The previous prime is 18919410941. The next prime is 18919410971. The reversal of 18919410944 is 44901491981.

It is a super-2 number, since 2×18919410944² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18919410892 and 18919410901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18919410941) 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, 5277062 + ... + 5280645.

Almost surely, 2^18919410944 is an apocalyptic number.

18919410944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18919410944 is an abundant number, since it is smaller than the sum of its proper divisors (24240499360).

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

18919410944 is an equidigital number, since it uses as much as digits as its factorization.

18919410944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557730 (or 10557716 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 18919410944 in words is "eighteen billion, nine hundred nineteen million, four hundred ten thousand, nine hundred forty-four".