19809383144 has 32 divisors (see below), whose sum is σ = 41037347520. Its totient is φ = 8916754176.

The previous prime is 19809383137. The next prime is 19809383177. The reversal of 19809383144 is 44138390891.

It is a junction number, because it is equal to n+sod(n) for n = 19809383092 and 19809383101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3163334 + ... + 3169589.

It is an arithmetic number, because the mean of its divisors is an integer number (1282417110).

Almost surely, 2^19809383144 is an apocalyptic number.

It is an amenable number.

19809383144 is an abundant number, since it is smaller than the sum of its proper divisors (21227964376).

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

19809383144 is a wasteful number, since it uses less digits than its factorization.

19809383144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332969 (or 6332965 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 19809383144 in words is "nineteen billion, eight hundred nine million, three hundred eighty-three thousand, one hundred forty-four".