19996081040 has 160 divisors (see below), whose sum is σ = 50717753856. Its totient is φ = 7287920640.

The previous prime is 19996081033. The next prime is 19996081081. The reversal of 19996081040 is 4018069991.

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, 43187849 + ... + 43188311.

Almost surely, 2^19996081040 is an apocalyptic number.

19996081040 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 19996081040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25358876928).

19996081040 is an abundant number, since it is smaller than the sum of its proper divisors (30721672816).

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

19996081040 is a wasteful number, since it uses less digits than its factorization.

19996081040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 19996081040 in words is "nineteen billion, nine hundred ninety-six million, eighty-one thousand, forty".