18336293489 has 2 divisors, whose sum is σ = 18336293490. Its totient is φ = 18336293488.

The previous prime is 18336293477. The next prime is 18336293491. The reversal of 18336293489 is 98439263381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16894800400 + 1441493089 = 129980^2 + 37967^2 .

It is an emirp because it is prime and its reverse (98439263381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18336293489 - 2⁸ = 18336293233 is a prime.

Together with 18336293491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18336298489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9168146744 + 9168146745.

It is an arithmetic number, because the mean of its divisors is an integer number (9168146745).

Almost surely, 2^18336293489 is an apocalyptic number.

It is an amenable number.

18336293489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18336293489 is an equidigital number, since it uses as much as digits as its factorization.

18336293489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 56.

The spelling of 18336293489 in words is "eighteen billion, three hundred thirty-six million, two hundred ninety-three thousand, four hundred eighty-nine".