20352434432 has 72 divisors (see below), whose sum is σ = 44510225760. Its totient is φ = 9211105280.

The previous prime is 20352434423. The next prime is 20352434437. The reversal of 20352434432 is 23443425302.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (20352434437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640619 + ... + 671637.

It is an arithmetic number, because the mean of its divisors is an integer number (618197580).

Almost surely, 2^20352434432 is an apocalyptic number.

20352434432 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 20352434432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22255112880).

20352434432 is an abundant number, since it is smaller than the sum of its proper divisors (24157791328).

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

20352434432 is a wasteful number, since it uses less digits than its factorization.

20352434432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31279 (or 31265 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 32.

Adding to 20352434432 its reverse (23443425302), we get a palindrome (43795859734).

The spelling of 20352434432 in words is "twenty billion, three hundred fifty-two million, four hundred thirty-four thousand, four hundred thirty-two".