12340203173 has 2 divisors, whose sum is σ = 12340203174. Its totient is φ = 12340203172.

The previous prime is 12340203131. The next prime is 12340203251. The reversal of 12340203173 is 37130204321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8854245409 + 3485957764 = 94097^2 + 59042^2 .

It is a cyclic number.

It is not a de Polignac number, because 12340203173 - 2¹⁶ = 12340137637 is a prime.

It is a super-2 number, since 2×12340203173² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340203103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170101586 + 6170101587.

It is an arithmetic number, because the mean of its divisors is an integer number (6170101587).

Almost surely, 2^12340203173 is an apocalyptic number.

It is an amenable number.

12340203173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340203173 is an equidigital number, since it uses as much as digits as its factorization.

12340203173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 12340203173 its reverse (37130204321), we get a palindrome (49470407494).

The spelling of 12340203173 in words is "twelve billion, three hundred forty million, two hundred three thousand, one hundred seventy-three".