20768223 has 8 divisors (see below), whose sum is σ = 31646848. Its totient is φ = 11867544.

The previous prime is 20768207. The next prime is 20768249. The reversal of 20768223 is 32286702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20768223 - 2⁴ = 20768207 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 (20768023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494461 + ... + 494502.

It is an arithmetic number, because the mean of its divisors is an integer number (3955856).

Almost surely, 2^20768223 is an apocalyptic number.

20768223 is a deficient number, since it is larger than the sum of its proper divisors (10878625).

20768223 is an equidigital number, since it uses as much as digits as its factorization.

20768223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988973.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20768223 is about 4557.2165847148. The cubic root of 20768223 is about 274.8736521516.

The spelling of 20768223 in words is "twenty million, seven hundred sixty-eight thousand, two hundred twenty-three".