31994828106072 has 32 divisors (see below), whose sum is σ = 86139921824880. Its totient is φ = 9844562494080.

The previous prime is 31994828106061. The next prime is 31994828106077. The reversal of 31994828106072 is 27060182849913.

It is a junction number, because it is equal to n+sod(n) for n = 31994828105997 and 31994828106015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31994828106077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51273762679 + ... + 51273763302.

Almost surely, 2^{31994828106072} is an apocalyptic number.

It is an amenable number.

31994828106072 is an abundant number, since it is smaller than the sum of its proper divisors (54145093718808).

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

31994828106072 is a wasteful number, since it uses less digits than its factorization.

31994828106072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102547526003 (or 102547525999 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 31994828106072 in words is "thirty-one trillion, nine hundred ninety-four billion, eight hundred twenty-eight million, one hundred six thousand, seventy-two".