320023221340 has 24 divisors (see below), whose sum is σ = 672918200640. Its totient is φ = 127843681728.

The previous prime is 320023221317. The next prime is 320023221347. The reversal of 320023221340 is 43122320023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320023221347) 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 7 ways as a sum of consecutive naturals, for example, 10334580 + ... + 10365499.

It is an arithmetic number, because the mean of its divisors is an integer number (28038258360).

Almost surely, 2^320023221340 is an apocalyptic number.

It is an amenable number.

320023221340 is an abundant number, since it is smaller than the sum of its proper divisors (352894979300).

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

320023221340 is a wasteful number, since it uses less digits than its factorization.

320023221340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20700861 (or 20700859 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 320023221340 its reverse (43122320023), we get a palindrome (363145541363).

The spelling of 320023221340 in words is "three hundred twenty billion, twenty-three million, two hundred twenty-one thousand, three hundred forty".