12420454424 has 32 divisors (see below), whose sum is σ = 26750386080. Its totient is φ = 5296026624.

The previous prime is 12420454421. The next prime is 12420454429. The reversal of 12420454424 is 42445402421.

It is a super-2 number, since 2×12420454424² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420454421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551897 + ... + 573960.

It is an arithmetic number, because the mean of its divisors is an integer number (835949565).

Almost surely, 2^12420454424 is an apocalyptic number.

12420454424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12420454424 is an abundant number, since it is smaller than the sum of its proper divisors (14329931656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12420454424 is a wasteful number, since it uses less digits than its factorization.

12420454424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126067 (or 1126063 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 32.

Adding to 12420454424 its reverse (42445402421), we get a palindrome (54865856845).

The spelling of 12420454424 in words is "twelve billion, four hundred twenty million, four hundred fifty-four thousand, four hundred twenty-four".