18041251 has 2 divisors, whose sum is σ = 18041252. Its totient is φ = 18041250.

The previous prime is 18041249. The next prime is 18041263. The reversal of 18041251 is 15214081.

It is a weak prime.

It is an emirp because it is prime and its reverse (15214081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18041251 - 2¹ = 18041249 is a prime.

Together with 18041249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18041351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020625 + 9020626.

It is an arithmetic number, because the mean of its divisors is an integer number (9020626).

Almost surely, 2^18041251 is an apocalyptic number.

18041251 is a deficient number, since it is larger than the sum of its proper divisors (1).

18041251 is an equidigital number, since it uses as much as digits as its factorization.

18041251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 18041251 is about 4247.4993819894. The cubic root of 18041251 is about 262.2741870571.

The spelling of 18041251 in words is "eighteen million, forty-one thousand, two hundred fifty-one".