2311030020 has 96 divisors (see below), whose sum is σ = 7100255232. Its totient is φ = 558125568.

The previous prime is 2311030013. The next prime is 2311030061. The reversal of 2311030020 is 200301132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2311029978 and 2311030005.

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, 13389 + ... + 69291.

It is an arithmetic number, because the mean of its divisors is an integer number (73960992).

Almost surely, 2^2311030020 is an apocalyptic number.

2311030020 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 2311030020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3550127616).

2311030020 is an abundant number, since it is smaller than the sum of its proper divisors (4789225212).

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

2311030020 is a wasteful number, since it uses less digits than its factorization.

2311030020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55981 (or 55979 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2311030020 is about 48073.1736002524. The cubic root of 2311030020 is about 1322.1128582138.

Adding to 2311030020 its reverse (200301132), we get a palindrome (2511331152).

The spelling of 2311030020 in words is "two billion, three hundred eleven million, thirty thousand, twenty".