18137851 has 2 divisors, whose sum is σ = 18137852. Its totient is φ = 18137850.

The previous prime is 18137849. The next prime is 18137857. The reversal of 18137851 is 15873181.

It is a weak prime.

It is an emirp because it is prime and its reverse (15873181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18137851 - 2¹ = 18137849 is a prime.

Together with 18137849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18137857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9068925 + 9068926.

It is an arithmetic number, because the mean of its divisors is an integer number (9068926).

Almost surely, 2^18137851 is an apocalyptic number.

18137851 is a deficient number, since it is larger than the sum of its proper divisors (1).

18137851 is an equidigital number, since it uses as much as digits as its factorization.

18137851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 34.

The square root of 18137851 is about 4258.8555974581. The cubic root of 18137851 is about 262.7414606663.

The spelling of 18137851 in words is "eighteen million, one hundred thirty-seven thousand, eight hundred fifty-one".