20423434144320 has 84 divisors (see below), whose sum is σ = 70248103702140. Its totient is φ = 5446249104384.

The previous prime is 20423434144319. The next prime is 20423434144357. The reversal of 20423434144320 is 2344143432402.

20423434144320 is a `hidden beast` number, since 2 + 0 + 4 + 234 + 3 + 414 + 4 + 3 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15658608753216 + 4764825391104 = 3957096^2 + 2182848^2 .

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

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 11 ways as a sum of consecutive naturals, for example, 3545732215 + ... + 3545737974.

It is an arithmetic number, because the mean of its divisors is an integer number (836286948835).

Almost surely, 2^{20423434144320} is an apocalyptic number.

20423434144320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423434144320 is an abundant number, since it is smaller than the sum of its proper divisors (49824669557820).

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

20423434144320 is a wasteful number, since it uses less digits than its factorization.

20423434144320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7091470212 (or 7091470199 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 20423434144320 its reverse (2344143432402), we get a palindrome (22767577576722).

The spelling of 20423434144320 in words is "twenty trillion, four hundred twenty-three billion, four hundred thirty-four million, one hundred forty-four thousand, three hundred twenty".