20585144 has 8 divisors (see below), whose sum is σ = 38597160. Its totient is φ = 10292568.

The previous prime is 20585129. The next prime is 20585167. The reversal of 20585144 is 44158502.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1286564 + ... + 1286579.

It is an arithmetic number, because the mean of its divisors is an integer number (4824645).

Almost surely, 2^20585144 is an apocalyptic number.

It is an amenable number.

20585144 is a deficient number, since it is larger than the sum of its proper divisors (18012016).

20585144 is a wasteful number, since it uses less digits than its factorization.

20585144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573149 (or 2573145 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 20585144 is about 4537.0854080566. The cubic root of 20585144 is about 274.0635652690.

The spelling of 20585144 in words is "twenty million, five hundred eighty-five thousand, one hundred forty-four".