20424518144 has 80 divisors (see below), whose sum is σ = 43957900800. Its totient is φ = 9452974080.

The previous prime is 20424518143. The next prime is 20424518159. The reversal of 20424518144 is 44181542402.

It is not an unprimeable number, because it can be changed into a prime (20424518143) 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, 337082 + ... + 393030.

It is an arithmetic number, because the mean of its divisors is an integer number (549473760).

Almost surely, 2^20424518144 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 20424518144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21978950400).

20424518144 is an abundant number, since it is smaller than the sum of its proper divisors (23533382656).

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

20424518144 is an equidigital number, since it uses as much as digits as its factorization.

20424518144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56021 (or 56005 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 35.

The spelling of 20424518144 in words is "twenty billion, four hundred twenty-four million, five hundred eighteen thousand, one hundred forty-four".