20340240223 has 4 divisors (see below), whose sum is σ = 21536724960. Its totient is φ = 19143755488.

The previous prime is 20340240203. The next prime is 20340240253. The reversal of 20340240223 is 32204204302.

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

It is a de Polignac number, because none of the positive numbers 2^k-20340240223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20340240194 and 20340240203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340240203) 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, 598242343 + ... + 598242376.

It is an arithmetic number, because the mean of its divisors is an integer number (5384181240).

Almost surely, 2^20340240223 is an apocalyptic number.

20340240223 is a deficient number, since it is larger than the sum of its proper divisors (1196484737).

20340240223 is a wasteful number, since it uses less digits than its factorization.

20340240223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196484736.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20340240223 its reverse (32204204302), we get a palindrome (52544444525).

The spelling of 20340240223 in words is "twenty billion, three hundred forty million, two hundred forty thousand, two hundred twenty-three".