31323303020 has 48 divisors (see below), whose sum is σ = 68720218560. Its totient is φ = 11970368256.

The previous prime is 31323303017. The next prime is 31323303073. The reversal of 31323303020 is 2030332313.

It is a super-2 number, since 2×31323303020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31323302983 and 31323303001.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 352466 + ... + 432294.

It is an arithmetic number, because the mean of its divisors is an integer number (1431671220).

Almost surely, 2^31323303020 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 31323303020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34360109280).

31323303020 is an abundant number, since it is smaller than the sum of its proper divisors (37396915540).

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

31323303020 is a wasteful number, since it uses less digits than its factorization.

31323303020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80714 (or 80712 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 20.

Adding to 31323303020 its reverse (2030332313), we get a palindrome (33353635333).

The spelling of 31323303020 in words is "thirty-one billion, three hundred twenty-three million, three hundred three thousand, twenty".