20662023 has 4 divisors (see below), whose sum is σ = 27549368. Its totient is φ = 13774680.

The previous prime is 20662009. The next prime is 20662039. The reversal of 20662023 is 32026602.

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

It is not a de Polignac number, because 20662023 - 2⁶ = 20661959 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 (20662003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3443668 + ... + 3443673.

It is an arithmetic number, because the mean of its divisors is an integer number (6887342).

Almost surely, 2^20662023 is an apocalyptic number.

20662023 is a deficient number, since it is larger than the sum of its proper divisors (6887345).

20662023 is an equidigital number, since it uses as much as digits as its factorization.

20662023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6887344.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20662023 is about 4545.5498017292. The cubic root of 20662023 is about 274.4043216502.

Adding to 20662023 its reverse (32026602), we get a palindrome (52688625).

The spelling of 20662023 in words is "twenty million, six hundred sixty-two thousand, twenty-three".