18189380311 has 2 divisors, whose sum is σ = 18189380312. Its totient is φ = 18189380310.

The previous prime is 18189380239. The next prime is 18189380317. The reversal of 18189380311 is 11308398181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18189380311 - 2²¹ = 18187283159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18189380317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9094690155 + 9094690156.

It is an arithmetic number, because the mean of its divisors is an integer number (9094690156).

Almost surely, 2^18189380311 is an apocalyptic number.

18189380311 is a deficient number, since it is larger than the sum of its proper divisors (1).

18189380311 is an equidigital number, since it uses as much as digits as its factorization.

18189380311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 43.

The spelling of 18189380311 in words is "eighteen billion, one hundred eighty-nine million, three hundred eighty thousand, three hundred eleven".