12040223420 has 24 divisors (see below), whose sum is σ = 25289247984. Its totient is φ = 4815179136.

The previous prime is 12040223357. The next prime is 12040223423. The reversal of 12040223420 is 2432204021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12040223392 and 12040223401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040223423) 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, 57152 + ... + 165368.

It is an arithmetic number, because the mean of its divisors is an integer number (1053718666).

Almost surely, 2^12040223420 is an apocalyptic number.

12040223420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12040223420 is an abundant number, since it is smaller than the sum of its proper divisors (13249024564).

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

12040223420 is a wasteful number, since it uses less digits than its factorization.

12040223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113789 (or 113787 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 12040223420 its reverse (2432204021), we get a palindrome (14472427441).

The spelling of 12040223420 in words is "twelve billion, forty million, two hundred twenty-three thousand, four hundred twenty".