2311310320020 has 576 divisors, whose sum is σ = 8247496857600. Its totient is φ = 518844579840.

The previous prime is 2311310319977. The next prime is 2311310320097. The reversal of 2311310320020 is 200230131132.

2311310320020 is a `hidden beast` number, since 2 + 3 + 11 + 310 + 320 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2311310319975 and 2311310320002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 265999836 + ... + 266008524.

Almost surely, 2^{2311310320020} is an apocalyptic number.

2311310320020 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 2311310320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4123748428800).

2311310320020 is an abundant number, since it is smaller than the sum of its proper divisors (5936186537580).

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

2311310320020 is a wasteful number, since it uses less digits than its factorization.

2311310320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8960 (or 8955 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 2311310320020 its reverse (200230131132), we get a palindrome (2511540451152).

The spelling of 2311310320020 in words is "two trillion, three hundred eleven billion, three hundred ten million, three hundred twenty thousand, twenty".