20544144 has 20 divisors (see below), whose sum is σ = 53072496. Its totient is φ = 6848032.

The previous prime is 20544119. The next prime is 20544169. The reversal of 20544144 is 44144502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20544119) and next prime (20544169).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213954 + ... + 214049.

Almost surely, 2^20544144 is an apocalyptic number.

20544144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20544144 is an abundant number, since it is smaller than the sum of its proper divisors (32528352).

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

20544144 is a wasteful number, since it uses less digits than its factorization.

20544144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428014 (or 428008 counting only the distinct ones).

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

The square root of 20544144 is about 4532.5648368225. The cubic root of 20544144 is about 273.8814910099.

Adding to 20544144 its reverse (44144502), we get a palindrome (64688646).

The spelling of 20544144 in words is "twenty million, five hundred forty-four thousand, one hundred forty-four".