19212008 has 8 divisors (see below), whose sum is σ = 36022530. Its totient is φ = 9606000.

The previous prime is 19212001. The next prime is 19212019. The reversal of 19212008 is 80021291.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 5654884 = 3682^2 + 2378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (19212001) 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 as a sum of consecutive naturals, namely, 1200743 + ... + 1200758.

Almost surely, 2^19212008 is an apocalyptic number.

It is an amenable number.

19212008 is a deficient number, since it is larger than the sum of its proper divisors (16810522).

19212008 is a wasteful number, since it uses less digits than its factorization.

19212008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401507 (or 2401503 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 19212008 is about 4383.1504651335. The cubic root of 19212008 is about 267.8289916692.

Adding to 19212008 its reverse (80021291), we get a palindrome (99233299).

The spelling of 19212008 in words is "nineteen million, two hundred twelve thousand, eight".