220404423 has 16 divisors (see below), whose sum is σ = 307005696. Its totient is φ = 140384640.

The previous prime is 220404413. The next prime is 220404433. The reversal of 220404423 is 324404022.

220404423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (220404413) and next prime (220404433).

It is not a de Polignac number, because 220404423 - 2¹⁷ = 220273351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220404423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220404413) 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, 92736 + ... + 95082.

It is an arithmetic number, because the mean of its divisors is an integer number (19187856).

Almost surely, 2^220404423 is an apocalyptic number.

220404423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

220404423 is a deficient number, since it is larger than the sum of its proper divisors (86601273).

220404423 is a wasteful number, since it uses less digits than its factorization.

220404423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 220404423 is about 14846.0238111085. The cubic root of 220404423 is about 604.0507601376.

Adding to 220404423 its reverse (324404022), we get a palindrome (544808445).

The spelling of 220404423 in words is "two hundred twenty million, four hundred four thousand, four hundred twenty-three".