31423344012 has 48 divisors (see below), whose sum is σ = 81661557600. Its totient is φ = 10449552960.

The previous prime is 31423343993. The next prime is 31423344041. The reversal of 31423344012 is 21044332413.

31423344012 is a `hidden beast` number, since 314 + 2 + 3 + 344 + 0 + 1 + 2 = 666.

It is a super-2 number, since 2×31423344012² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300087 + ... + 391022.

It is an arithmetic number, because the mean of its divisors is an integer number (1701282450).

Almost surely, 2^31423344012 is an apocalyptic number.

It is an amenable number.

31423344012 is an abundant number, since it is smaller than the sum of its proper divisors (50238213588).

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

31423344012 is a wasteful number, since it uses less digits than its factorization.

31423344012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691543 (or 691535 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 31423344012 its reverse (21044332413), we get a palindrome (52467676425).

The spelling of 31423344012 in words is "thirty-one billion, four hundred twenty-three million, three hundred forty-four thousand, twelve".