12423134420020 has 24 divisors (see below), whose sum is σ = 26090343148968. Its totient is φ = 4968918364800.

The previous prime is 12423134420009. The next prime is 12423134420023. The reversal of 12423134420020 is 2002443132421.

It can be written as a sum of positive squares in 4 ways, for example, as 964787559696 + 11458346860324 = 982236^2 + 3385018^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423134420023) 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, 20658871 + ... + 21251710.

It is an arithmetic number, because the mean of its divisors is an integer number (1087097631207).

Almost surely, 2^{12423134420020} is an apocalyptic number.

12423134420020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12423134420020 is an abundant number, since it is smaller than the sum of its proper divisors (13667208728948).

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

12423134420020 is a wasteful number, since it uses less digits than its factorization.

12423134420020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41925411 (or 41925409 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 12423134420020 its reverse (2002443132421), we get a palindrome (14425577552441).

The spelling of 12423134420020 in words is "twelve trillion, four hundred twenty-three billion, one hundred thirty-four million, four hundred twenty thousand, twenty".