12440432424420 has 1152 divisors, whose sum is σ = 52716918804480. Its totient is φ = 2364909281280.

The previous prime is 12440432424397. The next prime is 12440432424437. The reversal of 12440432424420 is 2442423404421.

12440432424420 is a `hidden beast` number, since 1 + 2 + 4 + 404 + 3 + 2 + 4 + 244 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 794045427 + ... + 794061093.

It is an arithmetic number, because the mean of its divisors is an integer number (45761214240).

Almost surely, 2^{12440432424420} is an apocalyptic number.

12440432424420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12440432424420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26358459402240).

12440432424420 is an abundant number, since it is smaller than the sum of its proper divisors (40276486380060).

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

12440432424420 is a wasteful number, since it uses less digits than its factorization.

12440432424420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15842 (or 15821 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 36.

Adding to 12440432424420 its reverse (2442423404421), we get a palindrome (14882855828841).

The spelling of 12440432424420 in words is "twelve trillion, four hundred forty billion, four hundred thirty-two million, four hundred twenty-four thousand, four hundred twenty".