18422722541 has 2 divisors, whose sum is σ = 18422722542. Its totient is φ = 18422722540.

The previous prime is 18422722427. The next prime is 18422722583. The reversal of 18422722541 is 14522722481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13635466441 + 4787256100 = 116771^2 + 69190^2 .

It is a cyclic number.

It is not a de Polignac number, because 18422722541 - 2³⁰ = 17348980717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18422722495 and 18422722504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18422772541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9211361270 + 9211361271.

It is an arithmetic number, because the mean of its divisors is an integer number (9211361271).

Almost surely, 2^18422722541 is an apocalyptic number.

It is an amenable number.

18422722541 is a deficient number, since it is larger than the sum of its proper divisors (1).

18422722541 is an equidigital number, since it uses as much as digits as its factorization.

18422722541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 38.

The spelling of 18422722541 in words is "eighteen billion, four hundred twenty-two million, seven hundred twenty-two thousand, five hundred forty-one".