19172116 has 6 divisors (see below), whose sum is σ = 33551210. Its totient is φ = 9586056.

The previous prime is 19172089. The next prime is 19172129. The reversal of 19172116 is 61127191.

It can be written as a sum of positive squares in only one way, i.e., 15968016 + 3204100 = 3996^2 + 1790^2 .

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, 2396511 + ... + 2396518.

Almost surely, 2^19172116 is an apocalyptic number.

It is an amenable number.

19172116 is a deficient number, since it is larger than the sum of its proper divisors (14379094).

19172116 is a wasteful number, since it uses less digits than its factorization.

19172116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793033 (or 4793031 counting only the distinct ones).

The product of its digits is 756, while the sum is 28.

The square root of 19172116 is about 4378.5974923484. The cubic root of 19172116 is about 267.6434889769.

The spelling of 19172116 in words is "nineteen million, one hundred seventy-two thousand, one hundred sixteen".