22918434 has 64 divisors (see below), whose sum is σ = 57784320. Its totient is φ = 5886720.

The previous prime is 22918433. The next prime is 22918447. The reversal of 22918434 is 43481922.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 22918395 and 22918404.

It is not an unprimeable number, because it can be changed into a prime (22918433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51987 + ... + 52425.

It is an arithmetic number, because the mean of its divisors is an integer number (902880).

Almost surely, 2^22918434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22918434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28892160).

22918434 is an abundant number, since it is smaller than the sum of its proper divisors (34865886).

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

22918434 is a wasteful number, since it uses less digits than its factorization.

22918434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575.

The product of its digits is 13824, while the sum is 33.

The square root of 22918434 is about 4787.3201271693. The cubic root of 22918434 is about 284.0501217495.

The spelling of 22918434 in words is "twenty-two million, nine hundred eighteen thousand, four hundred thirty-four".