22640012 has 6 divisors (see below), whose sum is σ = 39620028. Its totient is φ = 11320004.

The previous prime is 22639987. The next prime is 22640053. The reversal of 22640012 is 21004622.

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 as a sum of consecutive naturals, namely, 2829998 + ... + 2830005.

It is an arithmetic number, because the mean of its divisors is an integer number (6603338).

Almost surely, 2^22640012 is an apocalyptic number.

It is an amenable number.

22640012 is a deficient number, since it is larger than the sum of its proper divisors (16980016).

22640012 is a wasteful number, since it uses less digits than its factorization.

22640012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660007 (or 5660005 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22640012 is about 4758.1521623420. The cubic root of 22640012 is about 282.8951819157.

Adding to 22640012 its reverse (21004622), we get a palindrome (43644634).

The spelling of 22640012 in words is "twenty-two million, six hundred forty thousand, twelve".