18650916241 has 2 divisors, whose sum is σ = 18650916242. Its totient is φ = 18650916240.

The previous prime is 18650916197. The next prime is 18650916301. The reversal of 18650916241 is 14261905681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12860467216 + 5790449025 = 113404^2 + 76095^2 .

It is a cyclic number.

It is not a de Polignac number, because 18650916241 - 2¹⁵ = 18650883473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18650916041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9325458120 + 9325458121.

It is an arithmetic number, because the mean of its divisors is an integer number (9325458121).

Almost surely, 2^18650916241 is an apocalyptic number.

It is an amenable number.

18650916241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18650916241 is an equidigital number, since it uses as much as digits as its factorization.

18650916241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 18650916241 in words is "eighteen billion, six hundred fifty million, nine hundred sixteen thousand, two hundred forty-one".