20520444432 has 40 divisors (see below), whose sum is σ = 53020936800. Its totient is φ = 6838885120.

The previous prime is 20520444431. The next prime is 20520444569. The reversal of 20520444432 is 23444402502.

It is a self number, because there is not a number n which added to its sum of digits gives 20520444432.

It is not an unprimeable number, because it can be changed into a prime (20520444431) 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 7 ways as a sum of consecutive naturals, for example, 244207 + ... + 317297.

It is an arithmetic number, because the mean of its divisors is an integer number (1325523420).

Almost surely, 2^20520444432 is an apocalyptic number.

It is an amenable number.

20520444432 is an abundant number, since it is smaller than the sum of its proper divisors (32500492368).

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

20520444432 is a wasteful number, since it uses less digits than its factorization.

20520444432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78951 (or 78945 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 30.

Adding to 20520444432 its reverse (23444402502), we get a palindrome (43964846934).

The spelling of 20520444432 in words is "twenty billion, five hundred twenty million, four hundred forty-four thousand, four hundred thirty-two".