20099795823 has 12 divisors (see below), whose sum is σ = 29051399520. Its totient is φ = 13391389536.

The previous prime is 20099795783. The next prime is 20099795831. The reversal of 20099795823 is 32859799002.

It is not a de Polignac number, because 20099795823 - 2⁹ = 20099795311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20099795823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20099795123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 691158 + ... + 719651.

It is an arithmetic number, because the mean of its divisors is an integer number (2420949960).

Almost surely, 2^20099795823 is an apocalyptic number.

20099795823 is a deficient number, since it is larger than the sum of its proper divisors (8951603697).

20099795823 is a wasteful number, since it uses less digits than its factorization.

20099795823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412398 (or 1412395 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 20099795823 in words is "twenty billion, ninety-nine million, seven hundred ninety-five thousand, eight hundred twenty-three".