19381244 has 12 divisors (see below), whose sum is σ = 33978000. Its totient is φ = 9673248.

The previous prime is 19381237. The next prime is 19381267. The reversal of 19381244 is 44218391.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19381244.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (2831500).

Almost surely, 2^19381244 is an apocalyptic number.

It is an amenable number.

19381244 is a deficient number, since it is larger than the sum of its proper divisors (14596756).

19381244 is a wasteful number, since it uses less digits than its factorization.

19381244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8692 (or 8690 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 19381244 is about 4402.4134290182. The cubic root of 19381244 is about 268.6131169523.

The spelling of 19381244 in words is "nineteen million, three hundred eighty-one thousand, two hundred forty-four".