19388812 has 12 divisors (see below), whose sum is σ = 34360480. Its totient is φ = 9571536.

The previous prime is 19388807. The next prime is 19388827. The reversal of 19388812 is 21888391.

19388812 is nontrivially palindromic in base 3.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 3.

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 3 ways as a sum of consecutive naturals, for example, 30363 + ... + 30994.

Almost surely, 2^19388812 is an apocalyptic number.

It is an amenable number.

19388812 is a deficient number, since it is larger than the sum of its proper divisors (14971668).

19388812 is a wasteful number, since it uses less digits than its factorization.

19388812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61440 (or 61438 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The square root of 19388812 is about 4403.2728736702. The cubic root of 19388812 is about 268.6480751406.

The spelling of 19388812 in words is "nineteen million, three hundred eighty-eight thousand, eight hundred twelve".