32520220032 has 128 divisors (see below), whose sum is σ = 91187510400. Its totient is φ = 10268711424.

The previous prime is 32520220027. The next prime is 32520220039. The reversal of 32520220032 is 23002202523.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 32520219990 and 32520220008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32520220039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2627683 + ... + 2640029.

It is an arithmetic number, because the mean of its divisors is an integer number (712402425).

Almost surely, 2^32520220032 is an apocalyptic number.

32520220032 is a gapful number since it is divisible by the number (32) 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 32520220032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45593755200).

32520220032 is an abundant number, since it is smaller than the sum of its proper divisors (58667290368).

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

32520220032 is an equidigital number, since it uses as much as digits as its factorization.

32520220032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12421 (or 12371 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

Adding to 32520220032 its reverse (23002202523), we get a palindrome (55522422555).

The spelling of 32520220032 in words is "thirty-two billion, five hundred twenty million, two hundred twenty thousand, thirty-two".