20082591 has 12 divisors (see below), whose sum is σ = 29683368. Its totient is φ = 13076784.

The previous prime is 20082577. The next prime is 20082619. The reversal of 20082591 is 19528002.

It is not a de Polignac number, because 20082591 - 2¹⁸ = 19820447 is a prime.

It is a super-2 number, since 2×20082591² = 806620922546562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20082521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25560 + ... + 26333.

It is an arithmetic number, because the mean of its divisors is an integer number (2473614).

Almost surely, 2^20082591 is an apocalyptic number.

20082591 is a deficient number, since it is larger than the sum of its proper divisors (9600777).

20082591 is a wasteful number, since it uses less digits than its factorization.

20082591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51942 (or 51939 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20082591 is about 4481.3603961297. The cubic root of 20082591 is about 271.8148926178.

The spelling of 20082591 in words is "twenty million, eighty-two thousand, five hundred ninety-one".