20209093 has 4 divisors (see below), whose sum is σ = 20551680. Its totient is φ = 19866508.

The previous prime is 20209087. The next prime is 20209109. The reversal of 20209093 is 39090202.

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 20209093 - 2⁵ = 20209061 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 (20209003) 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 3 ways as a sum of consecutive naturals, for example, 171205 + ... + 171322.

It is an arithmetic number, because the mean of its divisors is an integer number (5137920).

Almost surely, 2^20209093 is an apocalyptic number.

It is an amenable number.

20209093 is a deficient number, since it is larger than the sum of its proper divisors (342587).

20209093 is an equidigital number, since it uses as much as digits as its factorization.

20209093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342586.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 20209093 is about 4495.4524800069. The cubic root of 20209093 is about 272.3844270442.

Adding to 20209093 its reverse (39090202), we get a palindrome (59299295).

The spelling of 20209093 in words is "twenty million, two hundred nine thousand, ninety-three".