12420404234 has 32 divisors (see below), whose sum is σ = 22792665600. Its totient is φ = 4957392240.

The previous prime is 12420404233. The next prime is 12420404239. The reversal of 12420404234 is 43240402421.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12420404233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380012 + ... + 411399.

It is an arithmetic number, because the mean of its divisors is an integer number (712270800).

Almost surely, 2^12420404234 is an apocalyptic number.

12420404234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12420404234 is a deficient number, since it is larger than the sum of its proper divisors (10372261366).

12420404234 is a wasteful number, since it uses less digits than its factorization.

12420404234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791498.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 12420404234 its reverse (43240402421), we get a palindrome (55660806655).

The spelling of 12420404234 in words is "twelve billion, four hundred twenty million, four hundred four thousand, two hundred thirty-four".