22213836 has 18 divisors (see below), whose sum is σ = 56151732. Its totient is φ = 7404600.

The previous prime is 22213823. The next prime is 22213847. The reversal of 22213836 is 63831222.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 308490 + ... + 308561.

Almost surely, 2^22213836 is an apocalyptic number.

It is an amenable number.

22213836 is an abundant number, since it is smaller than the sum of its proper divisors (33937896).

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

22213836 is a wasteful number, since it uses less digits than its factorization.

22213836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617061 (or 617056 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 22213836 is about 4713.1556307850. The cubic root of 22213836 is about 281.1088512487.

The spelling of 22213836 in words is "twenty-two million, two hundred thirteen thousand, eight hundred thirty-six".