12003430523 has 4 divisors (see below), whose sum is σ = 13718206320. Its totient is φ = 10288654728.

The previous prime is 12003430511. The next prime is 12003430531. The reversal of 12003430523 is 32503430021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32503430021 = 919 ⋅35368259.

It is a cyclic number.

It is not a de Polignac number, because 12003430523 - 2⁴ = 12003430507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12003400523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857387888 + ... + 857387901.

It is an arithmetic number, because the mean of its divisors is an integer number (3429551580).

Almost surely, 2^12003430523 is an apocalyptic number.

12003430523 is a deficient number, since it is larger than the sum of its proper divisors (1714775797).

12003430523 is an equidigital number, since it uses as much as digits as its factorization.

12003430523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714775796.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 12003430523 its reverse (32503430021), we get a palindrome (44506860544).

The spelling of 12003430523 in words is "twelve billion, three million, four hundred thirty thousand, five hundred twenty-three".