20445132488 has 64 divisors (see below), whose sum is σ = 43219552320. Its totient is φ = 8986163200.

The previous prime is 20445132413. The next prime is 20445132503. The reversal of 20445132488 is 88423154402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382631 + ... + 432777.

It is an arithmetic number, because the mean of its divisors is an integer number (675305505).

Almost surely, 2^20445132488 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 20445132488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21609776160).

20445132488 is an abundant number, since it is smaller than the sum of its proper divisors (22774419832).

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

20445132488 is a wasteful number, since it uses less digits than its factorization.

20445132488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50318 (or 50314 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 41.

The spelling of 20445132488 in words is "twenty billion, four hundred forty-five million, one hundred thirty-two thousand, four hundred eighty-eight".