20124192199 has 4 divisors (see below), whose sum is σ = 20208394080. Its totient is φ = 20039990320.

The previous prime is 20124192181. The next prime is 20124192211. The reversal of 20124192199 is 99129142102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20124192199 - 2⁹ = 20124191687 is a prime.

It is a super-2 number, since 2×20124192199² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124192139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42100582 + ... + 42101059.

It is an arithmetic number, because the mean of its divisors is an integer number (5052098520).

Almost surely, 2^20124192199 is an apocalyptic number.

20124192199 is a deficient number, since it is larger than the sum of its proper divisors (84201881).

20124192199 is an equidigital number, since it uses as much as digits as its factorization.

20124192199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84201880.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 20124192199 in words is "twenty billion, one hundred twenty-four million, one hundred ninety-two thousand, one hundred ninety-nine".