20630223 has 12 divisors (see below), whose sum is σ = 30827160. Its totient is φ = 13279056.

The previous prime is 20630213. The next prime is 20630243. The reversal of 20630223 is 32203602.

It is not a de Polignac number, because 20630223 - 2⁸ = 20629967 is a prime.

It is a super-2 number, since 2×20630223² = 851212202059458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20630196 and 20630205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39261 + ... + 39782.

It is an arithmetic number, because the mean of its divisors is an integer number (2568930).

Almost surely, 2^20630223 is an apocalyptic number.

20630223 is a deficient number, since it is larger than the sum of its proper divisors (10196937).

20630223 is a wasteful number, since it uses less digits than its factorization.

20630223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79078 (or 79075 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20630223 is about 4542.0505281205. The cubic root of 20630223 is about 274.2634748756.

Adding to 20630223 its reverse (32203602), we get a palindrome (52833825).

The spelling of 20630223 in words is "twenty million, six hundred thirty thousand, two hundred twenty-three".