22381434 has 20 divisors (see below), whose sum is σ = 50151354. Its totient is φ = 7460424.

The previous prime is 22381433. The next prime is 22381441. The reversal of 22381434 is 43418322.

22381434 is a `hidden beast` number, since 223 + 8 + 1 + 434 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21650409 + 731025 = 4653^2 + 855^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22381398 and 22381407.

It is not an unprimeable number, because it can be changed into a prime (22381433) 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 9 ways as a sum of consecutive naturals, for example, 68917 + ... + 69240.

Almost surely, 2^22381434 is an apocalyptic number.

22381434 is an abundant number, since it is smaller than the sum of its proper divisors (27769920).

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

22381434 is a wasteful number, since it uses less digits than its factorization.

22381434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138171 (or 138162 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 22381434 is about 4730.9020281549. The cubic root of 22381434 is about 281.8140467151.

Adding to 22381434 its reverse (43418322), we get a palindrome (65799756).

The spelling of 22381434 in words is "twenty-two million, three hundred eighty-one thousand, four hundred thirty-four".