31627961020 has 96 divisors (see below), whose sum is σ = 70908647040. Its totient is φ = 11824496640.

The previous prime is 31627960999. The next prime is 31627961021. The reversal of 31627961020 is 2016972613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31627961021) 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, 3655900 + ... + 3664540.

It is an arithmetic number, because the mean of its divisors is an integer number (738631740).

Almost surely, 2^31627961020 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 31627961020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35454323520).

31627961020 is an abundant number, since it is smaller than the sum of its proper divisors (39280686020).

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

31627961020 is a wasteful number, since it uses less digits than its factorization.

31627961020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8855 (or 8853 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 31627961020 in words is "thirty-one billion, six hundred twenty-seven million, nine hundred sixty-one thousand, twenty".