19818885099 has 16 divisors (see below), whose sum is σ = 29439194400. Its totient is φ = 11775676416.

The previous prime is 19818885083. The next prime is 19818885133. The reversal of 19818885099 is 99058881891.

It is not a de Polignac number, because 19818885099 - 2⁴ = 19818885083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19818885049) 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, 8760534 + ... + 8762795.

It is an arithmetic number, because the mean of its divisors is an integer number (1839949650).

Almost surely, 2^19818885099 is an apocalyptic number.

19818885099 is a deficient number, since it is larger than the sum of its proper divisors (9620309301).

19818885099 is a wasteful number, since it uses less digits than its factorization.

19818885099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17523374.

The product of its (nonzero) digits is 14929920, while the sum is 66.

The spelling of 19818885099 in words is "nineteen billion, eight hundred eighteen million, eight hundred eighty-five thousand, ninety-nine".