220123434 has 16 divisors (see below), whose sum is σ = 452145888. Its totient is φ = 71391312.

The previous prime is 220123411. The next prime is 220123451. The reversal of 220123434 is 434321022.

220123434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220123434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495552 + ... + 495995.

It is an arithmetic number, because the mean of its divisors is an integer number (28259118).

Almost surely, 2^220123434 is an apocalyptic number.

220123434 is an abundant number, since it is smaller than the sum of its proper divisors (232022454).

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

220123434 is a wasteful number, since it uses less digits than its factorization.

220123434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991589.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 220123434 is about 14836.5573500054. The cubic root of 220123434 is about 603.7939537376.

Adding to 220123434 its reverse (434321022), we get a palindrome (654444456).

The spelling of 220123434 in words is "two hundred twenty million, one hundred twenty-three thousand, four hundred thirty-four".