20255144 has 32 divisors (see below), whose sum is σ = 46744320. Its totient is φ = 8012736.

The previous prime is 20255117. The next prime is 20255153. The reversal of 20255144 is 44155202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13184 + ... + 14639.

It is an arithmetic number, because the mean of its divisors is an integer number (1460760).

Almost surely, 2^20255144 is an apocalyptic number.

It is an amenable number.

20255144 is an abundant number, since it is smaller than the sum of its proper divisors (26489176).

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

20255144 is a wasteful number, since it uses less digits than its factorization.

20255144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27849 (or 27845 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 20255144 is about 4500.5715192629. The cubic root of 20255144 is about 272.5911666457.

The spelling of 20255144 in words is "twenty million, two hundred fifty-five thousand, one hundred forty-four".