18422722427 has 2 divisors, whose sum is σ = 18422722428. Its totient is φ = 18422722426.

The previous prime is 18422722421. The next prime is 18422722541. The reversal of 18422722427 is 72422722481.

It is a weak prime.

It is an emirp because it is prime and its reverse (72422722481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18422722427 - 2¹² = 18422718331 is a prime.

It is not a weakly prime, because it can be changed into another prime (18422722421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9211361213 + 9211361214.

It is an arithmetic number, because the mean of its divisors is an integer number (9211361214).

Almost surely, 2^18422722427 is an apocalyptic number.

18422722427 is a deficient number, since it is larger than the sum of its proper divisors (1).

18422722427 is an equidigital number, since it uses as much as digits as its factorization.

18422722427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200704, while the sum is 41.

The spelling of 18422722427 in words is "eighteen billion, four hundred twenty-two million, seven hundred twenty-two thousand, four hundred twenty-seven".