20131132200 has 96 divisors (see below), whose sum is σ = 62458800000. Its totient is φ = 5363804160.

The previous prime is 20131132169. The next prime is 20131132211. The reversal of 20131132200 is 223113102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20131132200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 735969 + ... + 762831.

It is an arithmetic number, because the mean of its divisors is an integer number (650612500).

Almost surely, 2^20131132200 is an apocalyptic number.

20131132200 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 20131132200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31229400000).

20131132200 is an abundant number, since it is smaller than the sum of its proper divisors (42327667800).

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

20131132200 is a wasteful number, since it uses less digits than its factorization.

20131132200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28131 (or 28122 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20131132200 its reverse (223113102), we get a palindrome (20354245302).

The spelling of 20131132200 in words is "twenty billion, one hundred thirty-one million, one hundred thirty-two thousand, two hundred".