19434944040 has 64 divisors (see below), whose sum is σ = 59260671360. Its totient is φ = 5097688320.

The previous prime is 19434944027. The next prime is 19434944059. The reversal of 19434944040 is 4044943491.

It is a junction number, because it is equal to n+sod(n) for n = 19434943983 and 19434944001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1320204 + ... + 1334843.

It is an arithmetic number, because the mean of its divisors is an integer number (925947990).

Almost surely, 2^19434944040 is an apocalyptic number.

19434944040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19434944040 is an abundant number, since it is smaller than the sum of its proper divisors (39825727320).

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

19434944040 is a wasteful number, since it uses less digits than its factorization.

19434944040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655122 (or 2655118 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 19434944040 in words is "nineteen billion, four hundred thirty-four million, nine hundred forty-four thousand, forty".