20020120031232 has 156 divisors (see below), whose sum is σ = 57851420388684. Its totient is φ = 6670767882240.

The previous prime is 20020120031207. The next prime is 20020120031237. The reversal of 20020120031232 is 23213002102002.

20020120031232 is a `hidden beast` number, since 2 + 0 + 0 + 201 + 200 + 31 + 232 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9129486422016 + 10890633609216 = 3021504^2 + 3300096^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20020120031237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95483632 + ... + 95693072.

It is an arithmetic number, because the mean of its divisors is an integer number (370842438389).

Almost surely, 2^{20020120031232} 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 20020120031232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28925710194342).

20020120031232 is an abundant number, since it is smaller than the sum of its proper divisors (37831300357452).

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

20020120031232 is a wasteful number, since it uses less digits than its factorization.

20020120031232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212064 (or 212039 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20020120031232 its reverse (23213002102002), we get a palindrome (43233122133234).

The spelling of 20020120031232 in words is "twenty trillion, twenty billion, one hundred twenty million, thirty-one thousand, two hundred thirty-two".