20380544 has 16 divisors (see below), whose sum is σ = 40602120. Its totient is φ = 10190208.

The previous prime is 20380543. The next prime is 20380561. The reversal of 20380544 is 44508302.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380541) 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 as a sum of consecutive naturals, namely, 79484 + ... + 79739.

Almost surely, 2^20380544 is an apocalyptic number.

It is an amenable number.

20380544 is a deficient number, since it is larger than the sum of its proper divisors (20221576).

20380544 is an equidigital number, since it uses as much as digits as its factorization.

20380544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159237 (or 159225 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20380544 is about 4514.4815870707. The cubic root of 20380544 is about 273.1525488395.

Adding to 20380544 its reverse (44508302), we get a palindrome (64888846).

The spelling of 20380544 in words is "twenty million, three hundred eighty thousand, five hundred forty-four".