20344523 has 4 divisors (see below), whose sum is σ = 20531280. Its totient is φ = 20157768.

The previous prime is 20344517. The next prime is 20344549. The reversal of 20344523 is 32544302.

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 20344523 - 2⁴ = 20344507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344123) 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, 93215 + ... + 93432.

It is an arithmetic number, because the mean of its divisors is an integer number (5132820).

Almost surely, 2^20344523 is an apocalyptic number.

20344523 is a deficient number, since it is larger than the sum of its proper divisors (186757).

20344523 is a wasteful number, since it uses less digits than its factorization.

20344523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186756.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20344523 is about 4510.4903281129. The cubic root of 20344523 is about 272.9915287616.

Adding to 20344523 its reverse (32544302), we get a palindrome (52888825).

The spelling of 20344523 in words is "twenty million, three hundred forty-four thousand, five hundred twenty-three".