20310131200 has 120 divisors (see below), whose sum is σ = 53280503892. Its totient is φ = 7646085120.

The previous prime is 20310131161. The next prime is 20310131227. The reversal of 20310131200 is 213101302.

It can be written as a sum of positive squares in 6 ways, for example, as 9249822976 + 11060308224 = 96176^2 + 105168^2 .

It is a super-2 number, since 2×20310131200² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170932 + ... + 264268.

Almost surely, 2^20310131200 is an apocalyptic number.

20310131200 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 20310131200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26640251946).

20310131200 is an abundant number, since it is smaller than the sum of its proper divisors (32970372692).

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

20310131200 is an equidigital number, since it uses as much as digits as its factorization.

20310131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93382 (or 93361 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20310131200 its reverse (213101302), we get a palindrome (20523232502).

The spelling of 20310131200 in words is "twenty billion, three hundred ten million, one hundred thirty-one thousand, two hundred".