19809980099 has 16 divisors (see below), whose sum is σ = 25815722688. Its totient is φ = 14751839232.

The previous prime is 19809980083. The next prime is 19809980101. The reversal of 19809980099 is 99008990891.

It is not a de Polignac number, because 19809980099 - 2⁴ = 19809980083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19809989099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6401162 + ... + 6404255.

It is an arithmetic number, because the mean of its divisors is an integer number (1613482668).

Almost surely, 2^19809980099 is an apocalyptic number.

19809980099 is a deficient number, since it is larger than the sum of its proper divisors (6005742589).

19809980099 is a wasteful number, since it uses less digits than its factorization.

19809980099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805454.

The product of its (nonzero) digits is 3779136, while the sum is 62.

The spelling of 19809980099 in words is "nineteen billion, eight hundred nine million, nine hundred eighty thousand, ninety-nine".