20678223 has 4 divisors (see below), whose sum is σ = 27570968. Its totient is φ = 13785480.

The previous prime is 20678197. The next prime is 20678263. The reversal of 20678223 is 32287602.

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

It is not a de Polignac number, because 20678223 - 2⁵ = 20678191 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 (20678263) 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, 3446368 + ... + 3446373.

It is an arithmetic number, because the mean of its divisors is an integer number (6892742).

Almost surely, 2^20678223 is an apocalyptic number.

20678223 is a deficient number, since it is larger than the sum of its proper divisors (6892745).

20678223 is an equidigital number, since it uses as much as digits as its factorization.

20678223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6892744.

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

The square root of 20678223 is about 4547.3314152369. The cubic root of 20678223 is about 274.4760182233.

The spelling of 20678223 in words is "twenty million, six hundred seventy-eight thousand, two hundred twenty-three".