220423421 has 8 divisors (see below), whose sum is σ = 235617984. Its totient is φ = 205696480.

The previous prime is 220423387. The next prime is 220423451. The reversal of 220423421 is 124324022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220423421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220423393 and 220423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220423451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115931 + ... + 117816.

It is an arithmetic number, because the mean of its divisors is an integer number (29452248).

Almost surely, 2^220423421 is an apocalyptic number.

It is an amenable number.

220423421 is a deficient number, since it is larger than the sum of its proper divisors (15194563).

220423421 is a wasteful number, since it uses less digits than its factorization.

220423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233811.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 220423421 is about 14846.6636319410. The cubic root of 220423421 is about 604.0681152440.

Adding to 220423421 its reverse (124324022), we get a palindrome (344747443).

The spelling of 220423421 in words is "two hundred twenty million, four hundred twenty-three thousand, four hundred twenty-one".