18196337 has 2 divisors, whose sum is σ = 18196338. Its totient is φ = 18196336.

The previous prime is 18196309. The next prime is 18196391. The reversal of 18196337 is 73369181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 14641 = 4264^2 + 121^2 .

It is an emirp because it is prime and its reverse (73369181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18196337 - 2⁸ = 18196081 is a prime.

It is a super-2 number, since 2×18196337² = 662213360435138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18196337.

It is not a weakly prime, because it can be changed into another prime (18196037) 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, 9098168 + 9098169.

It is an arithmetic number, because the mean of its divisors is an integer number (9098169).

Almost surely, 2^18196337 is an apocalyptic number.

It is an amenable number.

18196337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18196337 is an equidigital number, since it uses as much as digits as its factorization.

18196337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 18196337 is about 4265.7164697153. The cubic root of 18196337 is about 263.0235633589.

The spelling of 18196337 in words is "eighteen million, one hundred ninety-six thousand, three hundred thirty-seven".