20330623 has 4 divisors (see below), whose sum is σ = 21526560. Its totient is φ = 19134688.

The previous prime is 20330591. The next prime is 20330647. The reversal of 20330623 is 32603302.

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 20330623 - 2⁵ = 20330591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20330623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330683) 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, 597943 + ... + 597976.

It is an arithmetic number, because the mean of its divisors is an integer number (5381640).

Almost surely, 2^20330623 is an apocalyptic number.

20330623 is a deficient number, since it is larger than the sum of its proper divisors (1195937).

20330623 is a wasteful number, since it uses less digits than its factorization.

20330623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195936.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 20330623 is about 4508.9492123997. The cubic root of 20330623 is about 272.9293425446.

Adding to 20330623 its reverse (32603302), we get a palindrome (52933925).

The spelling of 20330623 in words is "twenty million, three hundred thirty thousand, six hundred twenty-three".