18250891441 has 2 divisors, whose sum is σ = 18250891442. Its totient is φ = 18250891440.

The previous prime is 18250891411. The next prime is 18250891447. The reversal of 18250891441 is 14419805281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12968654400 + 5282237041 = 113880^2 + 72679^2 .

It is a cyclic number.

It is not a de Polignac number, because 18250891441 - 2⁹ = 18250890929 is a prime.

It is not a weakly prime, because it can be changed into another prime (18250891447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9125445720 + 9125445721.

It is an arithmetic number, because the mean of its divisors is an integer number (9125445721).

Almost surely, 2^18250891441 is an apocalyptic number.

It is an amenable number.

18250891441 is a deficient number, since it is larger than the sum of its proper divisors (1).

18250891441 is an equidigital number, since it uses as much as digits as its factorization.

18250891441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 18250891441 in words is "eighteen billion, two hundred fifty million, eight hundred ninety-one thousand, four hundred forty-one".