20539093 has 4 divisors (see below), whose sum is σ = 20828448. Its totient is φ = 20249740.

The previous prime is 20539091. The next prime is 20539109. The reversal of 20539093 is 39093502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20539093 - 2¹ = 20539091 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 (20539091) 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, 144571 + ... + 144712.

It is an arithmetic number, because the mean of its divisors is an integer number (5207112).

Almost surely, 2^20539093 is an apocalyptic number.

It is an amenable number.

20539093 is a deficient number, since it is larger than the sum of its proper divisors (289355).

20539093 is an equidigital number, since it uses as much as digits as its factorization.

20539093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289354.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 20539093 is about 4532.0076125267. The cubic root of 20539093 is about 273.8590435946.

The spelling of 20539093 in words is "twenty million, five hundred thirty-nine thousand, ninety-three".