12003420506 has 32 divisors (see below), whose sum is σ = 23629432320. Its totient is φ = 4430516400.

The previous prime is 12003420493. The next prime is 12003420509. The reversal of 12003420506 is 60502430021.

It is a super-2 number, since 2×12003420506² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12003420509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2048240 + ... + 2054091.

It is an arithmetic number, because the mean of its divisors is an integer number (738419760).

Almost surely, 2^12003420506 is an apocalyptic number.

12003420506 is a deficient number, since it is larger than the sum of its proper divisors (11626011814).

12003420506 is a wasteful number, since it uses less digits than its factorization.

12003420506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102370.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 12003420506 its reverse (60502430021), we get a palindrome (72505850527).

The spelling of 12003420506 in words is "twelve billion, three million, four hundred twenty thousand, five hundred six".