20019681199 has 4 divisors (see below), whose sum is σ = 22879635664. Its totient is φ = 17159726736.

The previous prime is 20019681197. The next prime is 20019681217. The reversal of 20019681199 is 99118691002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99118691002 = 2 ⋅49559345501.

It is a cyclic number.

It is not a de Polignac number, because 20019681199 - 2¹ = 20019681197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019681193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429977222 + ... + 1429977235.

It is an arithmetic number, because the mean of its divisors is an integer number (5719908916).

Almost surely, 2^20019681199 is an apocalyptic number.

20019681199 is a deficient number, since it is larger than the sum of its proper divisors (2859954465).

20019681199 is an equidigital number, since it uses as much as digits as its factorization.

20019681199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859954464.

The product of its (nonzero) digits is 69984, while the sum is 46.

The spelling of 20019681199 in words is "twenty billion, nineteen million, six hundred eighty-one thousand, one hundred ninety-nine".