20144 has 10 divisors (see below), whose sum is σ = 39060.
Its totient is φ = 10064.
The previous prime is 20143. The next prime is 20147. The reversal of 20144 is 44102.
Adding to 20144 its reverse (44102), we get a palindrome (64246).
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 20144.
It is not an unprimeable number, because it can be changed into a prime (20143) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614 + ... + 645.
It is an arithmetic number, because the mean of its divisors is an integer number (3906).
220144 is an apocalyptic number.
It is an amenable number.
20144 is a deficient number, since it is larger than the sum of its proper divisors (18916).
20144 is a wasteful number, since it uses less digits than its factorization.
20144 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1267 (or 1261 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 11.
The square root of 20144 is about 141.9295599937.
The cubic root of 20144 is about 27.2091664607.
The spelling of 20144 in words is "twenty thousand, one hundred forty-four", and thus it is an iban number.