19381144 has 8 divisors (see below), whose sum is σ = 36339660. Its totient is φ = 9690568.

The previous prime is 19381133. The next prime is 19381163. The reversal of 19381144 is 44118391.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1211314 + ... + 1211329.

Almost surely, 2^19381144 is an apocalyptic number.

It is an amenable number.

19381144 is a deficient number, since it is larger than the sum of its proper divisors (16958516).

19381144 is a wasteful number, since it uses less digits than its factorization.

19381144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422649 (or 2422645 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 19381144 is about 4402.4020715968. The cubic root of 19381144 is about 268.6126549703.

The spelling of 19381144 in words is "nineteen million, three hundred eighty-one thousand, one hundred forty-four".