22381394 has 16 divisors (see below), whose sum is σ = 38534400. Its totient is φ = 9550464.

The previous prime is 22381393. The next prime is 22381397. The reversal of 22381394 is 49318322.

It is a happy number.

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 22381394.

It is not an unprimeable number, because it can be changed into a prime (22381393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2 + ... + 6690.

It is an arithmetic number, because the mean of its divisors is an integer number (2408400).

Almost surely, 2^22381394 is an apocalyptic number.

22381394 is a deficient number, since it is larger than the sum of its proper divisors (16153006).

22381394 is a wasteful number, since it uses less digits than its factorization.

22381394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6937.

The product of its digits is 10368, while the sum is 32.

The square root of 22381394 is about 4730.8978006294. The cubic root of 22381394 is about 281.8138788294.

The spelling of 22381394 in words is "twenty-two million, three hundred eighty-one thousand, three hundred ninety-four".