423134320420 has 96 divisors (see below), whose sum is σ = 1022495265792. Its totient is φ = 144079423488.

The previous prime is 423134320379. The next prime is 423134320421. The reversal of 423134320420 is 24023431324.

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

It is not an unprimeable number, because it can be changed into a prime (423134320421) 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, 64332172 + ... + 64338748.

It is an arithmetic number, because the mean of its divisors is an integer number (10650992352).

Almost surely, 2^423134320420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423134320420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511247632896).

423134320420 is an abundant number, since it is smaller than the sum of its proper divisors (599360945372).

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

423134320420 is a wasteful number, since it uses less digits than its factorization.

423134320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9677 (or 9675 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 423134320420 its reverse (24023431324), we get a palindrome (447157751744).

The spelling of 423134320420 in words is "four hundred twenty-three billion, one hundred thirty-four million, three hundred twenty thousand, four hundred twenty".