12423444020 has 48 divisors (see below), whose sum is σ = 29317680000. Its totient is φ = 4387675776.

The previous prime is 12423444013. The next prime is 12423444023. The reversal of 12423444020 is 2044432421.

It is a happy number.

It is a super-2 number, since 2×12423444020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423444023) 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, 1032770 + ... + 1044729.

It is an arithmetic number, because the mean of its divisors is an integer number (610785000).

Almost surely, 2^12423444020 is an apocalyptic number.

12423444020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12423444020 is an abundant number, since it is smaller than the sum of its proper divisors (16894235980).

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

12423444020 is a wasteful number, since it uses less digits than its factorization.

12423444020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077544 (or 2077542 counting only the distinct ones).

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

Adding to 12423444020 its reverse (2044432421), we get a palindrome (14467876441).

The spelling of 12423444020 in words is "twelve billion, four hundred twenty-three million, four hundred forty-four thousand, twenty".