331320020 has 24 divisors (see below), whose sum is σ = 698901504. Its totient is φ = 131931936.

The previous prime is 331320019. The next prime is 331320029. The reversal of 331320020 is 20023133.

It is a junction number, because it is equal to n+sod(n) for n = 331319977 and 331320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331320029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32684 + ... + 41603.

It is an arithmetic number, because the mean of its divisors is an integer number (29120896).

Almost surely, 2^331320020 is an apocalyptic number.

It is an amenable number.

331320020 is an abundant number, since it is smaller than the sum of its proper divisors (367581484).

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

331320020 is a wasteful number, since it uses less digits than its factorization.

331320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74519 (or 74517 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 331320020 is about 18202.1982188965. The cubic root of 331320020 is about 691.9625008916.

Adding to 331320020 its reverse (20023133), we get a palindrome (351343153).

The spelling of 331320020 in words is "three hundred thirty-one million, three hundred twenty thousand, twenty".