31313230210020 has 384 divisors, whose sum is σ = 101788035084288. Its totient is φ = 7117129676800.

The previous prime is 31313230209979. The next prime is 31313230210037. The reversal of 31313230210020 is 2001203231313.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 853598599 + ... + 853635281.

It is an arithmetic number, because the mean of its divisors is an integer number (265073008032).

Almost surely, 2^{31313230210020} is an apocalyptic number.

31313230210020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31313230210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50894017542144).

31313230210020 is an abundant number, since it is smaller than the sum of its proper divisors (70474804874268).

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

31313230210020 is a wasteful number, since it uses less digits than its factorization.

31313230210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37843 (or 37841 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31313230210020 its reverse (2001203231313), we get a palindrome (33314433441333).

The spelling of 31313230210020 in words is "thirty-one trillion, three hundred thirteen billion, two hundred thirty million, two hundred ten thousand, twenty".