18690792247 has 2 divisors, whose sum is σ = 18690792248. Its totient is φ = 18690792246.

The previous prime is 18690792229. The next prime is 18690792299. The reversal of 18690792247 is 74229709681.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18690792247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18690792847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9345396123 + 9345396124.

It is an arithmetic number, because the mean of its divisors is an integer number (9345396124).

Almost surely, 2^18690792247 is an apocalyptic number.

18690792247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18690792247 is an equidigital number, since it uses as much as digits as its factorization.

18690792247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 18690792247 in words is "eighteen billion, six hundred ninety million, seven hundred ninety-two thousand, two hundred forty-seven".