20143245500 has 96 divisors (see below), whose sum is σ = 50321281920. Its totient is φ = 6900249600.

The previous prime is 20143245491. The next prime is 20143245533. The reversal of 20143245500 is 554234102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20143245500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6259892 + ... + 6263108.

It is an arithmetic number, because the mean of its divisors is an integer number (524180020).

Almost surely, 2^20143245500 is an apocalyptic number.

20143245500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20143245500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25160640960).

20143245500 is an abundant number, since it is smaller than the sum of its proper divisors (30178036420).

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

20143245500 is a wasteful number, since it uses less digits than its factorization.

20143245500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032 (or 5020 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20143245500 its reverse (554234102), we get a palindrome (20697479602).

The spelling of 20143245500 in words is "twenty billion, one hundred forty-three million, two hundred forty-five thousand, five hundred".