20235117 has 16 divisors (see below), whose sum is σ = 32648832. Its totient is φ = 10882560.

The previous prime is 20235109. The next prime is 20235121. The reversal of 20235117 is 71153202.

It is not a de Polignac number, because 20235117 - 2³ = 20235109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20235093 and 20235102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20235107) 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 15 ways as a sum of consecutive naturals, for example, 27984 + ... + 28697.

It is an arithmetic number, because the mean of its divisors is an integer number (2040552).

Almost surely, 2^20235117 is an apocalyptic number.

It is an amenable number.

20235117 is a deficient number, since it is larger than the sum of its proper divisors (12413715).

20235117 is a wasteful number, since it uses less digits than its factorization.

20235117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56708.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20235117 is about 4498.3460293757. The cubic root of 20235117 is about 272.5012967421.

Adding to 20235117 its reverse (71153202), we get a palindrome (91388319).

It can be divided in two parts, 2023 and 5117, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 20235117 in words is "twenty million, two hundred thirty-five thousand, one hundred seventeen".