18215026241 has 2 divisors, whose sum is σ = 18215026242. Its totient is φ = 18215026240.

The previous prime is 18215026189. The next prime is 18215026243. The reversal of 18215026241 is 14262051281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17756895025 + 458131216 = 133255^2 + 21404^2 .

It is a cyclic number.

It is not a de Polignac number, because 18215026241 - 2²⁶ = 18147917377 is a prime.

Together with 18215026243, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18215026198 and 18215026207.

It is not a weakly prime, because it can be changed into another prime (18215026243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9107513120 + 9107513121.

It is an arithmetic number, because the mean of its divisors is an integer number (9107513121).

Almost surely, 2^18215026241 is an apocalyptic number.

It is an amenable number.

18215026241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18215026241 is an equidigital number, since it uses as much as digits as its factorization.

18215026241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 18215026241 in words is "eighteen billion, two hundred fifteen million, twenty-six thousand, two hundred forty-one".