31368402306 has 20 divisors (see below), whose sum is σ = 70288457382. Its totient is φ = 10456134048.

The previous prime is 31368402287. The next prime is 31368402311. The reversal of 31368402306 is 60320486313.

It can be written as a sum of positive squares in only one way, i.e., 25230463281 + 6137939025 = 158841^2 + 78345^2 .

It is a super-2 number, since 2×31368402306² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 96815895 + ... + 96816218.

Almost surely, 2^31368402306 is an apocalyptic number.

31368402306 is an abundant number, since it is smaller than the sum of its proper divisors (38920055076).

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

31368402306 is a wasteful number, since it uses less digits than its factorization.

31368402306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193632127 (or 193632118 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 31368402306 its reverse (60320486313), we get a palindrome (91688888619).

The spelling of 31368402306 in words is "thirty-one billion, three hundred sixty-eight million, four hundred two thousand, three hundred six".