31320434012 has 12 divisors (see below), whose sum is σ = 62640868080. Its totient is φ = 13423043136.

The previous prime is 31320434009. The next prime is 31320434053. The reversal of 31320434012 is 21043402313.

31320434012 is an admirable number.

It is a super-2 number, since 2×31320434012² (a number of 22 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 3 ways as a sum of consecutive naturals, for example, 559293437 + ... + 559293492.

It is an arithmetic number, because the mean of its divisors is an integer number (5220072340).

Almost surely, 2^31320434012 is an apocalyptic number.

It is an amenable number.

31320434012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31320434012 is a wasteful number, since it uses less digits than its factorization.

31320434012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118586940 (or 1118586938 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31320434012 its reverse (21043402313), we get a palindrome (52363836325).

The spelling of 31320434012 in words is "thirty-one billion, three hundred twenty million, four hundred thirty-four thousand, twelve".