18243980303 has 2 divisors, whose sum is σ = 18243980304. Its totient is φ = 18243980302.

The previous prime is 18243980281. The next prime is 18243980353. The reversal of 18243980303 is 30308934281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18243980303 - 2²⁴ = 18227203087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18243980353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9121990151 + 9121990152.

It is an arithmetic number, because the mean of its divisors is an integer number (9121990152).

Almost surely, 2^18243980303 is an apocalyptic number.

18243980303 is a deficient number, since it is larger than the sum of its proper divisors (1).

18243980303 is an equidigital number, since it uses as much as digits as its factorization.

18243980303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 18243980303 in words is "eighteen billion, two hundred forty-three million, nine hundred eighty thousand, three hundred three".