18213763 has 2 divisors, whose sum is σ = 18213764. Its totient is φ = 18213762.

The previous prime is 18213751. The next prime is 18213773. The reversal of 18213763 is 36731281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18213763 is a prime.

It is not a weakly prime, because it can be changed into another prime (18213703) 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, 9106881 + 9106882.

It is an arithmetic number, because the mean of its divisors is an integer number (9106882).

Almost surely, 2^18213763 is an apocalyptic number.

18213763 is a deficient number, since it is larger than the sum of its proper divisors (1).

18213763 is an equidigital number, since it uses as much as digits as its factorization.

18213763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 18213763 is about 4267.7585451850. The cubic root of 18213763 is about 263.1074994144.

The spelling of 18213763 in words is "eighteen million, two hundred thirteen thousand, seven hundred sixty-three".