20492223 has 4 divisors (see below), whose sum is σ = 27322968. Its totient is φ = 13661480.

The previous prime is 20492201. The next prime is 20492231. The reversal of 20492223 is 32229402.

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 20492223 - 2⁸ = 20491967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20492193 and 20492202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20492243) 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 3 ways as a sum of consecutive naturals, for example, 3415368 + ... + 3415373.

It is an arithmetic number, because the mean of its divisors is an integer number (6830742).

Almost surely, 2^20492223 is an apocalyptic number.

20492223 is a deficient number, since it is larger than the sum of its proper divisors (6830745).

20492223 is an equidigital number, since it uses as much as digits as its factorization.

20492223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830744.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20492223 is about 4526.8336616227. The cubic root of 20492223 is about 273.6505704247.

The spelling of 20492223 in words is "twenty million, four hundred ninety-two thousand, two hundred twenty-three".