423403220020 has 24 divisors (see below), whose sum is σ = 969978286368. Its totient is φ = 153964807200.

The previous prime is 423403219991. The next prime is 423403220047. The reversal of 423403220020 is 20022304324.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 423403219973 and 423403220000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962279826 + ... + 962280265.

It is an arithmetic number, because the mean of its divisors is an integer number (40415761932).

Almost surely, 2^423403220020 is an apocalyptic number.

It is an amenable number.

423403220020 is an abundant number, since it is smaller than the sum of its proper divisors (546575066348).

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

423403220020 is a wasteful number, since it uses less digits than its factorization.

423403220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924560111 (or 1924560109 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 423403220020 its reverse (20022304324), we get a palindrome (443425524344).

The spelling of 423403220020 in words is "four hundred twenty-three billion, four hundred three million, two hundred twenty thousand, twenty".