18451411291 has 2 divisors, whose sum is σ = 18451411292. Its totient is φ = 18451411290.

The previous prime is 18451411289. The next prime is 18451411301. The reversal of 18451411291 is 19211415481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18451411291 - 2¹ = 18451411289 is a prime.

Together with 18451411289, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18451411291.

It is not a weakly prime, because it can be changed into another prime (18451415291) 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, 9225705645 + 9225705646.

It is an arithmetic number, because the mean of its divisors is an integer number (9225705646).

Almost surely, 2^18451411291 is an apocalyptic number.

18451411291 is a deficient number, since it is larger than the sum of its proper divisors (1).

18451411291 is an equidigital number, since it uses as much as digits as its factorization.

18451411291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 37.

The spelling of 18451411291 in words is "eighteen billion, four hundred fifty-one million, four hundred eleven thousand, two hundred ninety-one".