20132289 has 6 divisors (see below), whose sum is σ = 29079986. Its totient is φ = 13421520.

The previous prime is 20132251. The next prime is 20132297. The reversal of 20132289 is 98223102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19210689 + 921600 = 4383^2 + 960^2 .

It is not a de Polignac number, because 20132289 - 2¹² = 20128193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20132219) 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 5 ways as a sum of consecutive naturals, for example, 1118452 + ... + 1118469.

Almost surely, 2^20132289 is an apocalyptic number.

It is an amenable number.

20132289 is a deficient number, since it is larger than the sum of its proper divisors (8947697).

20132289 is a wasteful number, since it uses less digits than its factorization.

20132289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236927 (or 2236924 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20132289 is about 4486.9019378631. The cubic root of 20132289 is about 272.0389262701.

The spelling of 20132289 in words is "twenty million, one hundred thirty-two thousand, two hundred eighty-nine".