20331332231320 has 128 divisors (see below), whose sum is σ = 50378612256000. Its totient is φ = 7322947417600.

The previous prime is 20331332231311. The next prime is 20331332231351. The reversal of 20331332231320 is 2313223313302.

It is a super-2 number, since 2×20331332231320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 328163706 + ... + 328225654.

It is an arithmetic number, because the mean of its divisors is an integer number (393582908250).

Almost surely, 2^{20331332231320} is an apocalyptic number.

20331332231320 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 20331332231320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25189306128000).

20331332231320 is an abundant number, since it is smaller than the sum of its proper divisors (30047280024680).

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

20331332231320 is a wasteful number, since it uses less digits than its factorization.

20331332231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69049 (or 69045 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 20331332231320 its reverse (2313223313302), we get a palindrome (22644555544622).

The spelling of 20331332231320 in words is "twenty trillion, three hundred thirty-one billion, three hundred thirty-two million, two hundred thirty-one thousand, three hundred twenty".