20010223 has 2 divisors, whose sum is σ = 20010224. Its totient is φ = 20010222.

The previous prime is 20010217. The next prime is 20010239. The reversal of 20010223 is 32201002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20010223 - 2¹⁷ = 19879151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005111 + 10005112.

It is an arithmetic number, because the mean of its divisors is an integer number (10005112).

Almost surely, 2^20010223 is an apocalyptic number.

20010223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010223 is an equidigital number, since it uses as much as digits as its factorization.

20010223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20010223 is about 4473.2787751268. The cubic root of 20010223 is about 271.4880029338.

Adding to 20010223 its reverse (32201002), we get a palindrome (52211225).

The spelling of 20010223 in words is "twenty million, ten thousand, two hundred twenty-three".