31020002033020 has 288 divisors, whose sum is σ = 89055551825856. Its totient is φ = 8921796710400.

The previous prime is 31020002033017. The next prime is 31020002033039. The reversal of 31020002033020 is 2033020002013.

It is a super-2 number, since 2×31020002033020² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31020002032985 and 31020002033003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 428932384 + ... + 429004696.

It is an arithmetic number, because the mean of its divisors is an integer number (309220666062).

Almost surely, 2^{31020002033020} 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 31020002033020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44527775912928).

31020002033020 is an abundant number, since it is smaller than the sum of its proper divisors (58035549792836).

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

31020002033020 is a wasteful number, since it uses less digits than its factorization.

31020002033020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75421 (or 75412 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 31020002033020 its reverse (2033020002013), we get a palindrome (33053022035033).

The spelling of 31020002033020 in words is "thirty-one trillion, twenty billion, two million, thirty-three thousand, twenty".