20423143303524 has 108 divisors (see below), whose sum is σ = 55918808946000. Its totient is φ = 6282133086528.

The previous prime is 20423143303523. The next prime is 20423143303531. The reversal of 20423143303524 is 42530334132402.

20423143303524 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 314 + 330 + 3 + 5 + 2 + 4 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20423143303523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19562347 + ... + 20579885.

It is an arithmetic number, because the mean of its divisors is an integer number (517766749500).

Almost surely, 2^{20423143303524} 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 20423143303524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27959404473000).

20423143303524 is an abundant number, since it is smaller than the sum of its proper divisors (35495665642476).

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

20423143303524 is a wasteful number, since it uses less digits than its factorization.

20423143303524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020874 (or 1020856 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 36.

Adding to 20423143303524 its reverse (42530334132402), we get a palindrome (62953477435926).

The spelling of 20423143303524 in words is "twenty trillion, four hundred twenty-three billion, one hundred forty-three million, three hundred three thousand, five hundred twenty-four".