20043132500 has 90 divisors (see below), whose sum is σ = 45398591238. Its totient is φ = 7739984000.

The previous prime is 20043132493. The next prime is 20043132521. The reversal of 20043132500 is 523134002.

It is a happy number.

It can be written as a sum of positive squares in 15 ways, for example, as 19997353744 + 45778756 = 141412^2 + 6766^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2097734 + ... + 2107266.

Almost surely, 2^20043132500 is an apocalyptic number.

20043132500 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 20043132500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22699295619).

20043132500 is an abundant number, since it is smaller than the sum of its proper divisors (25355458738).

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

20043132500 is an equidigital number, since it uses as much as digits as its factorization.

20043132500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9615 (or 9569 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20043132500 its reverse (523134002), we get a palindrome (20566266502).

The spelling of 20043132500 in words is "twenty billion, forty-three million, one hundred thirty-two thousand, five hundred".