18357517379 has 2 divisors, whose sum is σ = 18357517380. Its totient is φ = 18357517378.

The previous prime is 18357517361. The next prime is 18357517421. The reversal of 18357517379 is 97371575381.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18357517379 is a prime.

It is not a weakly prime, because it can be changed into another prime (18357517309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9178758689 + 9178758690.

It is an arithmetic number, because the mean of its divisors is an integer number (9178758690).

Almost surely, 2^18357517379 is an apocalyptic number.

18357517379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18357517379 is an equidigital number, since it uses as much as digits as its factorization.

18357517379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5556600, while the sum is 56.

The spelling of 18357517379 in words is "eighteen billion, three hundred fifty-seven million, five hundred seventeen thousand, three hundred seventy-nine".