2320991331012 has 72 divisors (see below), whose sum is σ = 6072096925440. Its totient is φ = 746636425920.

The previous prime is 2320991330981. The next prime is 2320991331013. The reversal of 2320991331012 is 2101331990232.

2320991331012 is a `hidden beast` number, since 2 + 320 + 9 + 9 + 1 + 3 + 310 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2320991331013) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1718587 + ... + 2755997.

It is an arithmetic number, because the mean of its divisors is an integer number (84334679520).

Almost surely, 2^{2320991331012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2320991331012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3036048462720).

2320991331012 is an abundant number, since it is smaller than the sum of its proper divisors (3751105594428).

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

2320991331012 is a wasteful number, since it uses less digits than its factorization.

2320991331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039593 (or 1039588 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The spelling of 2320991331012 in words is "two trillion, three hundred twenty billion, nine hundred ninety-one million, three hundred thirty-one thousand, twelve".