20320242432 has 144 divisors (see below), whose sum is σ = 62189272320. Its totient is φ = 5769916416.

The previous prime is 20320242427. The next prime is 20320242433. The reversal of 20320242432 is 23424202302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20320242433) 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, 864694 + ... + 887882.

Almost surely, 2^20320242432 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 20320242432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31094636160).

20320242432 is an abundant number, since it is smaller than the sum of its proper divisors (41869029888).

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

20320242432 is a wasteful number, since it uses less digits than its factorization.

20320242432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23378 (or 23364 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20320242432 its reverse (23424202302), we get a palindrome (43744444734).

The spelling of 20320242432 in words is "twenty billion, three hundred twenty million, two hundred forty-two thousand, four hundred thirty-two".