20216023 has 6 divisors (see below), whose sum is σ = 20778576. Its totient is φ = 19668312.

The previous prime is 20216017. The next prime is 20216033. The reversal of 20216023 is 32061202.

It is not a de Polignac number, because 20216023 - 2⁵ = 20215991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20215988 and 20216006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6015 + ... + 8752.

It is an arithmetic number, because the mean of its divisors is an integer number (3463096).

Almost surely, 2^20216023 is an apocalyptic number.

20216023 is a deficient number, since it is larger than the sum of its proper divisors (562553).

20216023 is an equidigital number, since it uses as much as digits as its factorization.

20216023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14841 (or 14804 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20216023 is about 4496.2231928586. The cubic root of 20216023 is about 272.4155583829.

Adding to 20216023 its reverse (32061202), we get a palindrome (52277225).

The spelling of 20216023 in words is "twenty million, two hundred sixteen thousand, twenty-three".