20099186999 has 4 divisors (see below), whose sum is σ = 20283583320. Its totient is φ = 19914790680.

The previous prime is 20099186969. The next prime is 20099187013. The reversal of 20099186999 is 99968199002.

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 20099186999 - 2⁸ = 20099186743 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 (20099186969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92197997 + ... + 92198214.

It is an arithmetic number, because the mean of its divisors is an integer number (5070895830).

Almost surely, 2^20099186999 is an apocalyptic number.

20099186999 is a deficient number, since it is larger than the sum of its proper divisors (184396321).

20099186999 is a wasteful number, since it uses less digits than its factorization.

20099186999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184396320.

The product of its (nonzero) digits is 5668704, while the sum is 62.

The spelling of 20099186999 in words is "twenty billion, ninety-nine million, one hundred eighty-six thousand, nine hundred ninety-nine".