20050121432 has 64 divisors (see below), whose sum is σ = 42087911040. Its totient is φ = 8875321600.

The previous prime is 20050121417. The next prime is 20050121437. The reversal of 20050121432 is 23412105002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050121437) 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, 2113163 + ... + 2122629.

It is an arithmetic number, because the mean of its divisors is an integer number (657623610).

Almost surely, 2^20050121432 is an apocalyptic number.

20050121432 is a gapful number since it is divisible by the number (22) 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 20050121432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21043955520).

20050121432 is an abundant number, since it is smaller than the sum of its proper divisors (22037789608).

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

20050121432 is a wasteful number, since it uses less digits than its factorization.

20050121432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112 (or 10108 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20050121432 its reverse (23412105002), we get a palindrome (43462226434).

The spelling of 20050121432 in words is "twenty billion, fifty million, one hundred twenty-one thousand, four hundred thirty-two".