20192812499 has 2 divisors, whose sum is σ = 20192812500. Its totient is φ = 20192812498.

The previous prime is 20192812489. The next prime is 20192812501. The reversal of 20192812499 is 99421829102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20192812499 - 2⁸ = 20192812243 is a prime.

Together with 20192812501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20192812489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10096406249 + 10096406250.

It is an arithmetic number, because the mean of its divisors is an integer number (10096406250).

Almost surely, 2^20192812499 is an apocalyptic number.

20192812499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20192812499 is an equidigital number, since it uses as much as digits as its factorization.

20192812499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 20192812499 in words is "twenty billion, one hundred ninety-two million, eight hundred twelve thousand, four hundred ninety-nine".