20340235 has 4 divisors (see below), whose sum is σ = 24408288. Its totient is φ = 16272184.

The previous prime is 20340233. The next prime is 20340251. The reversal of 20340235 is 53204302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20340235 - 2¹ = 20340233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340233) 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, 2034019 + ... + 2034028.

It is an arithmetic number, because the mean of its divisors is an integer number (6102072).

Almost surely, 2^20340235 is an apocalyptic number.

20340235 is a deficient number, since it is larger than the sum of its proper divisors (4068053).

20340235 is an equidigital number, since it uses as much as digits as its factorization.

20340235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068052.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20340235 is about 4510.0149667157. The cubic root of 20340235 is about 272.9723480068.

Adding to 20340235 its reverse (53204302), we get a palindrome (73544537).

The spelling of 20340235 in words is "twenty million, three hundred forty thousand, two hundred thirty-five".