22000012 has 6 divisors (see below), whose sum is σ = 38500028. Its totient is φ = 11000004.

The previous prime is 22000003. The next prime is 22000021. The reversal of 22000012 is 21000022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22000003) and next prime (22000021).

It is a junction number, because it is equal to n+sod(n) for n = 21999959 and 22000004.

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, 2749998 + ... + 2750005.

Almost surely, 2^22000012 is an apocalyptic number.

It is an amenable number.

22000012 is a deficient number, since it is larger than the sum of its proper divisors (16500016).

22000012 is a wasteful number, since it uses less digits than its factorization.

22000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5500007 (or 5500005 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 22000012 is about 4690.4170390276. The cubic root of 22000012 is about 280.2039840117.

Adding to 22000012 its reverse (21000022), we get a palindrome (43000034).

The spelling of 22000012 in words is "twenty-two million, twelve", and thus it is an aban number and an uban number.