20143435504 has 80 divisors (see below), whose sum is σ = 41652468000. Its totient is φ = 9409720320.

The previous prime is 20143435493. The next prime is 20143435511. The reversal of 20143435504 is 40553434102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14095462 + ... + 14096890.

It is an arithmetic number, because the mean of its divisors is an integer number (520655850).

Almost surely, 2^20143435504 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 20143435504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20826234000).

20143435504 is an abundant number, since it is smaller than the sum of its proper divisors (21509032496).

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

20143435504 is a wasteful number, since it uses less digits than its factorization.

20143435504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066 (or 2060 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20143435504 its reverse (40553434102), we get a palindrome (60696869606).

The spelling of 20143435504 in words is "twenty billion, one hundred forty-three million, four hundred thirty-five thousand, five hundred four".