20501302432 has 48 divisors (see below), whose sum is σ = 43590151080. Its totient is φ = 9435267072.

The previous prime is 20501302417. The next prime is 20501302441. The reversal of 20501302432 is 23420310502.

It can be written as a sum of positive squares in 4 ways, for example, as 18269306896 + 2231995536 = 135164^2 + 47244^2 .

It is a super-2 number, since 2×20501302432² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77044 + ... + 216652.

Almost surely, 2^20501302432 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 20501302432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21795075540).

20501302432 is an abundant number, since it is smaller than the sum of its proper divisors (23088848648).

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

20501302432 is a wasteful number, since it uses less digits than its factorization.

20501302432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139985 (or 139977 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 20501302432 its reverse (23420310502), we get a palindrome (43921612934).

The spelling of 20501302432 in words is "twenty billion, five hundred one million, three hundred two thousand, four hundred thirty-two".