20089539 has 24 divisors (see below), whose sum is σ = 30750720. Its totient is φ = 13100616.

The previous prime is 20089513. The next prime is 20089541. The reversal of 20089539 is 93598002.

20089539 = 415² + 416² + ... + 508².

It is not a de Polignac number, because 20089539 - 2⁵ = 20089507 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20089339) 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 23 ways as a sum of consecutive naturals, for example, 10542 + ... + 12300.

It is an arithmetic number, because the mean of its divisors is an integer number (1281280).

Almost surely, 2^20089539 is an apocalyptic number.

20089539 is a deficient number, since it is larger than the sum of its proper divisors (10661181).

20089539 is an equidigital number, since it uses as much as digits as its factorization.

20089539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1809 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20089539 is about 4482.1355401192. The cubic root of 20089539 is about 271.8462357202.

The spelling of 20089539 in words is "twenty million, eighty-nine thousand, five hundred thirty-nine".