31323300020 has 24 divisors (see below), whose sum is σ = 69648279624. Its totient is φ = 11792301056.

The previous prime is 31323299993. The next prime is 31323300101. The reversal of 31323300020 is 2000332313.

It can be written as a sum of positive squares in 4 ways, for example, as 4572734884 + 26750565136 = 67622^2 + 163556^2 .

It is a super-2 number, since 2×31323300020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46063337 + ... + 46064016.

It is an arithmetic number, because the mean of its divisors is an integer number (2902011651).

Almost surely, 2^31323300020 is an apocalyptic number.

It is an amenable number.

31323300020 is an abundant number, since it is smaller than the sum of its proper divisors (38324979604).

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

31323300020 is a wasteful number, since it uses less digits than its factorization.

31323300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92127379 (or 92127377 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 31323300020 its reverse (2000332313), we get a palindrome (33323632333).

The spelling of 31323300020 in words is "thirty-one billion, three hundred twenty-three million, three hundred thousand, twenty".