31320010000 has 100 divisors (see below), whose sum is σ = 75936155152. Its totient is φ = 12510288000.

The previous prime is 31320009991. The next prime is 31320010021. The reversal of 31320010000 is 1002313.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8828227 + ... + 8831773.

Almost surely, 2^31320010000 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 31320010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37968077576).

31320010000 is an abundant number, since it is smaller than the sum of its proper divisors (44616145152).

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

31320010000 is an equidigital number, since it uses as much as digits as its factorization.

31320010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458 (or 4437 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 31320010000 its reverse (1002313), we get a palindrome (31321012313).

The spelling of 31320010000 in words is "thirty-one billion, three hundred twenty million, ten thousand".