20311130020 has 48 divisors (see below), whose sum is σ = 44026617600. Its totient is φ = 7865092224.

The previous prime is 20311130003. The next prime is 20311130071. The reversal of 20311130020 is 2003111302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78297 + ... + 216223.

It is an arithmetic number, because the mean of its divisors is an integer number (917221200).

Almost surely, 2^20311130020 is an apocalyptic number.

20311130020 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 20311130020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22013308800).

20311130020 is an abundant number, since it is smaller than the sum of its proper divisors (23715487580).

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

20311130020 is a wasteful number, since it uses less digits than its factorization.

20311130020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138172 (or 138170 counting only the distinct ones).

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

Adding to 20311130020 its reverse (2003111302), we get a palindrome (22314241322).

The spelling of 20311130020 in words is "twenty billion, three hundred eleven million, one hundred thirty thousand, twenty".