20199999999 has 8 divisors (see below), whose sum is σ = 27127098880. Its totient is φ = 13369783896.

The previous prime is 20199999991. The next prime is 20200000013. The reversal of 20199999999 is 99999999102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20199999999 - 2³ = 20199999991 is a prime.

It is a Duffinian number.

20199999999 is a modest number, since divided by 999999 gives 20199 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 20199999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20199999991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24220207 + ... + 24221040.

It is an arithmetic number, because the mean of its divisors is an integer number (3390887360).

Almost surely, 2^20199999999 is an apocalyptic number.

20199999999 is a deficient number, since it is larger than the sum of its proper divisors (6927098881).

20199999999 is a wasteful number, since it uses less digits than its factorization.

20199999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48441389.

The product of its (nonzero) digits is 86093442, while the sum is 75.

The spelling of 20199999999 in words is "twenty billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".