20423143303504 has 20 divisors (see below), whose sum is σ = 39598660178676. Its totient is φ = 10204134225152.

The previous prime is 20423143303499. The next prime is 20423143303523. The reversal of 20423143303504 is 40530334132402.

It can be written as a sum of positive squares in 2 ways, for example, as 19018321000000 + 1404822303504 = 4361000^2 + 1185252^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20423143303504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464816509 + ... + 464860444.

Almost surely, 2^{20423143303504} is an apocalyptic number.

It is an amenable number.

20423143303504 is a deficient number, since it is larger than the sum of its proper divisors (19175516875172).

20423143303504 is a wasteful number, since it uses less digits than its factorization.

20423143303504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929678334 (or 929678328 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 34.

Adding to 20423143303504 its reverse (40530334132402), we get a palindrome (60953477435906).

The spelling of 20423143303504 in words is "twenty trillion, four hundred twenty-three billion, one hundred forty-three million, three hundred three thousand, five hundred four".