220430021 has 8 divisors (see below), whose sum is σ = 256673664. Its totient is φ = 185374800.

The previous prime is 220430017. The next prime is 220430033. The reversal of 220430021 is 120034022.

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

It is a cyclic number.

It is not a de Polignac number, because 220430021 - 2² = 220430017 is a prime.

It is a super-4 number, since 4×220430021⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220429978 and 220430005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220430011) 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, 296705 + ... + 297446.

It is an arithmetic number, because the mean of its divisors is an integer number (32084208).

Almost surely, 2^220430021 is an apocalyptic number.

It is an amenable number.

220430021 is a deficient number, since it is larger than the sum of its proper divisors (36243643).

220430021 is an equidigital number, since it uses as much as digits as its factorization.

220430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594211.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220430021 is about 14846.8859024376. The cubic root of 220430021 is about 604.0741442612.

Adding to 220430021 its reverse (120034022), we get a palindrome (340464043).

The spelling of 220430021 in words is "two hundred twenty million, four hundred thirty thousand, twenty-one".