20032121232 has 80 divisors (see below), whose sum is σ = 57665743680. Its totient is φ = 6658080768.

The previous prime is 20032121209. The next prime is 20032121233. The reversal of 20032121232 is 23212123002.

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 (20032121233) 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 15 ways as a sum of consecutive naturals, for example, 83088 + ... + 216720.

It is an arithmetic number, because the mean of its divisors is an integer number (720821796).

Almost surely, 2^20032121232 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 20032121232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28832871840).

20032121232 is an abundant number, since it is smaller than the sum of its proper divisors (37633622448).

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

20032121232 is a wasteful number, since it uses less digits than its factorization.

20032121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133997 (or 133985 counting only the distinct ones).

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

Adding to 20032121232 its reverse (23212123002), we get a palindrome (43244244234).

The spelling of 20032121232 in words is "twenty billion, thirty-two million, one hundred twenty-one thousand, two hundred thirty-two".