20544144000 has 128 divisors (see below), whose sum is σ = 68103996480. Its totient is φ = 5478425600.

The previous prime is 20544143993. The next prime is 20544144001. The reversal of 20544144000 is 44144502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20544144001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166002 + ... + 262001.

Almost surely, 2^20544144000 is an apocalyptic number.

20544144000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20544144000 is an abundant number, since it is smaller than the sum of its proper divisors (47559852480).

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

20544144000 is an equidigital number, since it uses as much as digits as its factorization.

20544144000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428035 (or 428013 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 20544144000 its reverse (44144502), we get a palindrome (20588288502).

The spelling of 20544144000 in words is "twenty billion, five hundred forty-four million, one hundred forty-four thousand".