20210223 has 16 divisors (see below), whose sum is σ = 29523456. Its totient is φ = 12195840.

The previous prime is 20210189. The next prime is 20210237. The reversal of 20210223 is 32201202.

It is not a de Polignac number, because 20210223 - 2⁶ = 20210159 is a prime.

It is a super-2 number, since 2×20210223² = 816906227419458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20210199 and 20210208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7290 + ... + 9672.

It is an arithmetic number, because the mean of its divisors is an integer number (1845216).

Almost surely, 2^20210223 is an apocalyptic number.

20210223 is a deficient number, since it is larger than the sum of its proper divisors (9313233).

20210223 is a wasteful number, since it uses less digits than its factorization.

20210223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20210223 is about 4495.5781608154. The cubic root of 20210223 is about 272.3895037798.

Adding to 20210223 its reverse (32201202), we get a palindrome (52411425).

The spelling of 20210223 in words is "twenty million, two hundred ten thousand, two hundred twenty-three".