22011964 has 12 divisors (see below), whose sum is σ = 41484184. Its totient is φ = 10159344.

The previous prime is 22011949. The next prime is 22011967. The reversal of 22011964 is 46911022.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011967) 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 3 ways as a sum of consecutive naturals, for example, 211602 + ... + 211705.

Almost surely, 2^22011964 is an apocalyptic number.

It is an amenable number.

22011964 is a deficient number, since it is larger than the sum of its proper divisors (19472220).

22011964 is a wasteful number, since it uses less digits than its factorization.

22011964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423324 (or 423322 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 22011964 is about 4691.6909531639. The cubic root of 22011964 is about 280.2547171920.

Adding to 22011964 its reverse (46911022), we get a palindrome (68922986).

The spelling of 22011964 in words is "twenty-two million, eleven thousand, nine hundred sixty-four".