18411803 has 2 divisors, whose sum is σ = 18411804. Its totient is φ = 18411802.

The previous prime is 18411797. The next prime is 18411857. The reversal of 18411803 is 30811481.

It is a weak prime.

It is an emirp because it is prime and its reverse (30811481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18411803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18413803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9205901 + 9205902.

It is an arithmetic number, because the mean of its divisors is an integer number (9205902).

Almost surely, 2^18411803 is an apocalyptic number.

18411803 is a deficient number, since it is larger than the sum of its proper divisors (1).

18411803 is an equidigital number, since it uses as much as digits as its factorization.

18411803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 18411803 is about 4290.8976916258. The cubic root of 18411803 is about 264.0576616856.

The spelling of 18411803 in words is "eighteen million, four hundred eleven thousand, eight hundred three".