423440012204020 has 96 divisors (see below), whose sum is σ = 1018103433177600. Its totient is φ = 144915757668864.

The previous prime is 423440012203969. The next prime is 423440012204021. The reversal of 423440012204020 is 20402210044324.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 423440012204020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423440012204021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168451561 + ... + 170946799.

It is an arithmetic number, because the mean of its divisors is an integer number (10605244095600).

Almost surely, 2^{423440012204020} is an apocalyptic number.

It is an amenable number.

423440012204020 is an abundant number, since it is smaller than the sum of its proper divisors (594663420973580).

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

423440012204020 is a wasteful number, since it uses less digits than its factorization.

423440012204020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497457 (or 2497455 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 423440012204020 its reverse (20402210044324), we get a palindrome (443842222248344).

The spelling of 423440012204020 in words is "four hundred twenty-three trillion, four hundred forty billion, twelve million, two hundred four thousand, twenty".