19899211775 has 6 divisors (see below), whose sum is σ = 24675022632. Its totient is φ = 15919369400.

The previous prime is 19899211771. The next prime is 19899211811. The reversal of 19899211775 is 57711299891.

It is not a de Polignac number, because 19899211775 - 2² = 19899211771 is a prime.

It is a super-3 number, since 3×19899211775³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19899211771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 397984211 + ... + 397984260.

It is an arithmetic number, because the mean of its divisors is an integer number (4112503772).

Almost surely, 2^19899211775 is an apocalyptic number.

19899211775 is a deficient number, since it is larger than the sum of its proper divisors (4775810857).

19899211775 is an equidigital number, since it uses as much as digits as its factorization.

19899211775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795968481 (or 795968476 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 59.

The spelling of 19899211775 in words is "nineteen billion, eight hundred ninety-nine million, two hundred eleven thousand, seven hundred seventy-five".