20089549 has 4 divisors (see below), whose sum is σ = 20579580. Its totient is φ = 19599520.

The previous prime is 20089541. The next prime is 20089561. The reversal of 20089549 is 94598002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94598002 = 2 ⋅47299001.

It can be written as a sum of positive squares in 2 ways, for example, as 1036324 + 19053225 = 1018^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 20089549 - 2³ = 20089541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20089541) 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, 244954 + ... + 245035.

It is an arithmetic number, because the mean of its divisors is an integer number (5144895).

Almost surely, 2^20089549 is an apocalyptic number.

It is an amenable number.

20089549 is a deficient number, since it is larger than the sum of its proper divisors (490031).

20089549 is an equidigital number, since it uses as much as digits as its factorization.

20089549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490030.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20089549 is about 4482.1366556588. The cubic root of 20089549 is about 271.8462808260.

The spelling of 20089549 in words is "twenty million, eighty-nine thousand, five hundred forty-nine".