19157144 has 8 divisors (see below), whose sum is σ = 35919660. Its totient is φ = 9578568.

The previous prime is 19157141. The next prime is 19157189. The reversal of 19157144 is 44175191.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19157144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19157141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1197314 + ... + 1197329.

Almost surely, 2^19157144 is an apocalyptic number.

It is an amenable number.

19157144 is a deficient number, since it is larger than the sum of its proper divisors (16762516).

19157144 is a wasteful number, since it uses less digits than its factorization.

19157144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394649 (or 2394645 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 19157144 is about 4376.8874785628. The cubic root of 19157144 is about 267.5738009315.

The spelling of 19157144 in words is "nineteen million, one hundred fifty-seven thousand, one hundred forty-four".