20144523560 has 128 divisors (see below), whose sum is σ = 52393305600. Its totient is φ = 6827950080.

The previous prime is 20144523557. The next prime is 20144523569. The reversal of 20144523560 is 6532544102.

It is not an unprimeable number, because it can be changed into a prime (20144523569) 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 31 ways as a sum of consecutive naturals, for example, 19964336 + ... + 19965344.

It is an arithmetic number, because the mean of its divisors is an integer number (409322700).

Almost surely, 2^20144523560 is an apocalyptic number.

20144523560 is a gapful number since it is divisible by the number (20) 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 20144523560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26196652800).

20144523560 is an abundant number, since it is smaller than the sum of its proper divisors (32248782040).

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

20144523560 is a wasteful number, since it uses less digits than its factorization.

20144523560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771 (or 1767 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20144523560 in words is "twenty billion, one hundred forty-four million, five hundred twenty-three thousand, five hundred sixty".