19917112 has 8 divisors (see below), whose sum is σ = 37344600. Its totient is φ = 9958552.

The previous prime is 19917067. The next prime is 19917167. The reversal of 19917112 is 21171991.

It is a happy number.

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, 1244812 + ... + 1244827.

It is an arithmetic number, because the mean of its divisors is an integer number (4668075).

Almost surely, 2^19917112 is an apocalyptic number.

It is an amenable number.

19917112 is a deficient number, since it is larger than the sum of its proper divisors (17427488).

19917112 is a wasteful number, since it uses less digits than its factorization.

19917112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489645 (or 2489641 counting only the distinct ones).

The product of its digits is 1134, while the sum is 31.

The square root of 19917112 is about 4462.8591732207. The cubic root of 19917112 is about 271.0662546847.

The spelling of 19917112 in words is "nineteen million, nine hundred seventeen thousand, one hundred twelve".