31350020000 has 120 divisors (see below), whose sum is σ = 83059190676. Its totient is φ = 11575296000.

The previous prime is 31350019997. The next prime is 31350020047. The reversal of 31350020000 is 2005313.

It can be written as a sum of positive squares in 10 ways, for example, as 13455072016 + 17894947984 = 115996^2 + 133772^2 .

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, 199712 + ... + 320288.

Almost surely, 2^31350020000 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 31350020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41529595338).

31350020000 is an abundant number, since it is smaller than the sum of its proper divisors (51709170676).

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

31350020000 is a wasteful number, since it uses less digits than its factorization.

31350020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120620 (or 120597 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

Adding to 31350020000 its reverse (2005313), we get a palindrome (31352025313).

The spelling of 31350020000 in words is "thirty-one billion, three hundred fifty million, twenty thousand".