20144856 has 16 divisors (see below), whose sum is σ = 50362200. Its totient is φ = 6714944.

The previous prime is 20144837. The next prime is 20144857. The reversal of 20144856 is 65844102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419661 + ... + 419708.

Almost surely, 2^20144856 is an apocalyptic number.

It is an amenable number.

20144856 is an abundant number, since it is smaller than the sum of its proper divisors (30217344).

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

20144856 is a wasteful number, since it uses less digits than its factorization.

20144856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839378 (or 839374 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20144856 is about 4488.3021288679. The cubic root of 20144856 is about 272.0955186441.

Adding to 20144856 its reverse (65844102), we get a palindrome (85988958).

The spelling of 20144856 in words is "twenty million, one hundred forty-four thousand, eight hundred fifty-six".