20271089 has 4 divisors (see below), whose sum is σ = 21463524. Its totient is φ = 19078656.

The previous prime is 20271061. The next prime is 20271091. The reversal of 20271089 is 98017202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14592400 + 5678689 = 3820^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 20271089 - 2²⁰ = 19222513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20271049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596192 + ... + 596225.

It is an arithmetic number, because the mean of its divisors is an integer number (5365881).

Almost surely, 2^20271089 is an apocalyptic number.

It is an amenable number.

20271089 is a deficient number, since it is larger than the sum of its proper divisors (1192435).

20271089 is a wasteful number, since it uses less digits than its factorization.

20271089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192434.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 20271089 is about 4502.3426124630. The cubic root of 20271089 is about 272.6626764825.

The spelling of 20271089 in words is "twenty million, two hundred seventy-one thousand, eighty-nine".