12030203817 has 6 divisors (see below), whose sum is σ = 17376961082. Its totient is φ = 8020135872.

The previous prime is 12030203813. The next prime is 12030203839. The reversal of 12030203817 is 71830203021.

It can be written as a sum of positive squares in only one way, i.e., 10460380176 + 1569823641 = 102276^2 + 39621^2 .

It is not a de Polignac number, because 12030203817 - 2² = 12030203813 is a prime.

It is a super-2 number, since 2×12030203817² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12030203813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 668344648 + ... + 668344665.

Almost surely, 2^12030203817 is an apocalyptic number.

It is an amenable number.

12030203817 is a deficient number, since it is larger than the sum of its proper divisors (5346757265).

12030203817 is a wasteful number, since it uses less digits than its factorization.

12030203817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336689319 (or 1336689316 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 12030203817 its reverse (71830203021), we get a palindrome (83860406838).

The spelling of 12030203817 in words is "twelve billion, thirty million, two hundred three thousand, eight hundred seventeen".