20584081 has 8 divisors (see below), whose sum is σ = 23552640. Its totient is φ = 17622528.

The previous prime is 20584037. The next prime is 20584117. The reversal of 20584081 is 18048502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20584081 - 2¹⁷ = 20453009 is a prime.

It is a super-2 number, since 2×20584081² = 847408781229122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20584001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8820 + ... + 10906.

It is an arithmetic number, because the mean of its divisors is an integer number (2944080).

Almost surely, 2^20584081 is an apocalyptic number.

It is an amenable number.

20584081 is a deficient number, since it is larger than the sum of its proper divisors (2968559).

20584081 is a wasteful number, since it uses less digits than its factorization.

20584081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 20584081 is about 4536.9682608544. The cubic root of 20584081 is about 274.0588477151.

The spelling of 20584081 in words is "twenty million, five hundred eighty-four thousand, eighty-one".