17943137243 has 2 divisors, whose sum is σ = 17943137244. Its totient is φ = 17943137242.

The previous prime is 17943137231. The next prime is 17943137297. The reversal of 17943137243 is 34273134971.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17943137243 - 2⁸ = 17943136987 is a prime.

It is a super-2 number, since 2×17943137243² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17943137194 and 17943137203.

It is not a weakly prime, because it can be changed into another prime (17943137743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8971568621 + 8971568622.

It is an arithmetic number, because the mean of its divisors is an integer number (8971568622).

Almost surely, 2^17943137243 is an apocalyptic number.

17943137243 is a deficient number, since it is larger than the sum of its proper divisors (1).

17943137243 is an equidigital number, since it uses as much as digits as its factorization.

17943137243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 44.

The spelling of 17943137243 in words is "seventeen billion, nine hundred forty-three million, one hundred thirty-seven thousand, two hundred forty-three".