20017023 has 8 divisors (see below), whose sum is σ = 28742448. Its totient is φ = 12318144.

The previous prime is 20017009. The next prime is 20017031. The reversal of 20017023 is 32071002.

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

It is not a de Polignac number, because 20017023 - 2⁸ = 20016767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20016993 and 20017011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20017043) 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, 256590 + ... + 256667.

It is an arithmetic number, because the mean of its divisors is an integer number (3592806).

Almost surely, 2^20017023 is an apocalyptic number.

20017023 is a deficient number, since it is larger than the sum of its proper divisors (8725425).

20017023 is a wasteful number, since it uses less digits than its factorization.

20017023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513273.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 20017023 is about 4474.0387794475. The cubic root of 20017023 is about 271.5187523719.

Adding to 20017023 its reverse (32071002), we get a palindrome (52088025).

The spelling of 20017023 in words is "twenty million, seventeen thousand, twenty-three".