19934383920 has 160 divisors (see below), whose sum is σ = 67647170304. Its totient is φ = 4815897600.

The previous prime is 19934383913. The next prime is 19934383943. The reversal of 19934383920 is 2938343991.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 760635 + ... + 786405.

Almost surely, 2^19934383920 is an apocalyptic number.

19934383920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19934383920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33823585152).

19934383920 is an abundant number, since it is smaller than the sum of its proper divisors (47712786384).

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

19934383920 is a wasteful number, since it uses less digits than its factorization.

19934383920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26091 (or 26085 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 19934383920 in words is "nineteen billion, nine hundred thirty-four million, three hundred eighty-three thousand, nine hundred twenty".