19117172 has 12 divisors (see below), whose sum is σ = 33487776. Its totient is φ = 9549240.

The previous prime is 19117171. The next prime is 19117181. The reversal of 19117172 is 27171191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19117171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4463 + ... + 7625.

It is an arithmetic number, because the mean of its divisors is an integer number (2790648).

Almost surely, 2^19117172 is an apocalyptic number.

It is an amenable number.

19117172 is a deficient number, since it is larger than the sum of its proper divisors (14370604).

19117172 is a wasteful number, since it uses less digits than its factorization.

19117172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678 (or 4676 counting only the distinct ones).

The product of its digits is 882, while the sum is 29.

The square root of 19117172 is about 4372.3188355837. The cubic root of 19117172 is about 267.3875708857.

The spelling of 19117172 in words is "nineteen million, one hundred seventeen thousand, one hundred seventy-two".