20090539 has 8 divisors (see below), whose sum is σ = 23429600. Its totient is φ = 17220168.

The previous prime is 20090537. The next prime is 20090561. The reversal of 20090539 is 93509002.

It is not a de Polignac number, because 20090539 - 2¹ = 20090537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20090537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28944 + ... + 29629.

It is an arithmetic number, because the mean of its divisors is an integer number (2928700).

Almost surely, 2^20090539 is an apocalyptic number.

20090539 is a deficient number, since it is larger than the sum of its proper divisors (3339061).

20090539 is an frugal number, since it uses more digits than its factorization.

20090539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58594 (or 58580 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 20090539 is about 4482.2470926980. The cubic root of 20090539 is about 271.8507462224.

The spelling of 20090539 in words is "twenty million, ninety thousand, five hundred thirty-nine".