18889822247 has 2 divisors, whose sum is σ = 18889822248. Its totient is φ = 18889822246.

The previous prime is 18889822201. The next prime is 18889822271. The reversal of 18889822247 is 74222898881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18889822247 - 2⁶ = 18889822183 is a prime.

It is a super-2 number, since 2×18889822247² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18889822747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9444911123 + 9444911124.

It is an arithmetic number, because the mean of its divisors is an integer number (9444911124).

Almost surely, 2^18889822247 is an apocalyptic number.

18889822247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18889822247 is an equidigital number, since it uses as much as digits as its factorization.

18889822247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8257536, while the sum is 59.

The spelling of 18889822247 in words is "eighteen billion, eight hundred eighty-nine million, eight hundred twenty-two thousand, two hundred forty-seven".