31400340012 has 96 divisors (see below), whose sum is σ = 83156156160. Its totient is φ = 10244257920.

The previous prime is 31400340011. The next prime is 31400340019. The reversal of 31400340012 is 21004300413.

31400340012 is a `hidden beast` number, since 314 + 0 + 0 + 340 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31400340011) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1017603 + ... + 1048005.

It is an arithmetic number, because the mean of its divisors is an integer number (866209960).

Almost surely, 2^31400340012 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 31400340012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41578078080).

31400340012 is an abundant number, since it is smaller than the sum of its proper divisors (51755816148).

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

31400340012 is a wasteful number, since it uses less digits than its factorization.

31400340012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30620 (or 30612 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31400340012 its reverse (21004300413), we get a palindrome (52404640425).

The spelling of 31400340012 in words is "thirty-one billion, four hundred million, three hundred forty thousand, twelve".