20088591 has 16 divisors (see below), whose sum is σ = 28216320. Its totient is φ = 12687840.

The previous prime is 20088571. The next prime is 20088613. The reversal of 20088591 is 19588002.

It is a happy number.

It is not a de Polignac number, because 20088591 - 2⁵ = 20088559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20088511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6186 + ... + 8856.

It is an arithmetic number, because the mean of its divisors is an integer number (1763520).

Almost surely, 2^20088591 is an apocalyptic number.

20088591 is a deficient number, since it is larger than the sum of its proper divisors (8127729).

20088591 is a wasteful number, since it uses less digits than its factorization.

20088591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 20088591 is about 4482.0297857109. The cubic root of 20088591 is about 271.8419596260.

The spelling of 20088591 in words is "twenty million, eighty-eight thousand, five hundred ninety-one".