20734223 has 4 divisors (see below), whose sum is σ = 20854248. Its totient is φ = 20614200.

The previous prime is 20734199. The next prime is 20734229. The reversal of 20734223 is 32243702.

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 20734223 - 2¹⁴ = 20717839 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 (20734229) 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, 59753 + ... + 60098.

It is an arithmetic number, because the mean of its divisors is an integer number (5213562).

Almost surely, 2^20734223 is an apocalyptic number.

20734223 is a deficient number, since it is larger than the sum of its proper divisors (120025).

20734223 is a wasteful number, since it uses less digits than its factorization.

20734223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120024.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 20734223 is about 4553.4847095384. The cubic root of 20734223 is about 274.7235701599.

Adding to 20734223 its reverse (32243702), we get a palindrome (52977925).

The spelling of 20734223 in words is "twenty million, seven hundred thirty-four thousand, two hundred twenty-three".