31040420000 has 120 divisors (see below), whose sum is σ = 76639183236. Its totient is φ = 12371456000.

The previous prime is 31040419987. The next prime is 31040420051. The reversal of 31040420000 is 2404013.

It can be written as a sum of positive squares in 10 ways, for example, as 815902096 + 30224517904 = 28564^2 + 173852^2 .

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, 5857352 + ... + 5862648.

Almost surely, 2^31040420000 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 31040420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38319591618).

31040420000 is an abundant number, since it is smaller than the sum of its proper divisors (45598763236).

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

31040420000 is an equidigital number, since it uses as much as digits as its factorization.

31040420000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620 (or 5597 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 31040420000 its reverse (2404013), we get a palindrome (31042824013).

The spelling of 31040420000 in words is "thirty-one billion, forty million, four hundred twenty thousand".