220123134 has 96 divisors (see below), whose sum is σ = 597991680. Its totient is φ = 56851200.

The previous prime is 220123129. The next prime is 220123139. The reversal of 220123134 is 431321022.

It is an interprime number because it is at equal distance from previous prime (220123129) and next prime (220123139).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220123139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 333697 + ... + 334355.

It is an arithmetic number, because the mean of its divisors is an integer number (6229080).

Almost surely, 2^220123134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220123134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298995840).

220123134 is an abundant number, since it is smaller than the sum of its proper divisors (377868546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220123134 is a wasteful number, since it uses less digits than its factorization.

220123134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 220123134 is about 14836.5472398399. The cubic root of 220123134 is about 603.7936794395.

Adding to 220123134 its reverse (431321022), we get a palindrome (651444156).

The spelling of 220123134 in words is "two hundred twenty million, one hundred twenty-three thousand, one hundred thirty-four".