20693109 has 8 divisors (see below), whose sum is σ = 29043040. Its totient is φ = 13069296.

The previous prime is 20693087. The next prime is 20693149. The reversal of 20693109 is 90139602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20693109 - 2⁸ = 20692853 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 (20693149) 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, 181462 + ... + 181575.

It is an arithmetic number, because the mean of its divisors is an integer number (3630380).

Almost surely, 2^20693109 is an apocalyptic number.

It is an amenable number.

20693109 is a deficient number, since it is larger than the sum of its proper divisors (8349931).

20693109 is a wasteful number, since it uses less digits than its factorization.

20693109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363059.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 20693109 is about 4548.9679049209. The cubic root of 20693109 is about 274.5418664017.

It can be divided in two parts, 20693 and 109, that added together give a palindrome (20802).

The spelling of 20693109 in words is "twenty million, six hundred ninety-three thousand, one hundred nine".