220423663 has 4 divisors (see below), whose sum is σ = 220564840. Its totient is φ = 220282488.

The previous prime is 220423627. The next prime is 220423669. The reversal of 220423663 is 366324022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220423663 - 2¹⁷ = 220292591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220423669) 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 3 ways as a sum of consecutive naturals, for example, 68220 + ... + 71377.

It is an arithmetic number, because the mean of its divisors is an integer number (55141210).

Almost surely, 2^220423663 is an apocalyptic number.

220423663 is a deficient number, since it is larger than the sum of its proper divisors (141177).

220423663 is a wasteful number, since it uses less digits than its factorization.

220423663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141176.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 220423663 is about 14846.6717819180. The cubic root of 220423663 is about 604.0683363101.

Adding to 220423663 its reverse (366324022), we get a palindrome (586747685).

The spelling of 220423663 in words is "two hundred twenty million, four hundred twenty-three thousand, six hundred sixty-three".