19161914 has 16 divisors (see below), whose sum is σ = 29248128. Its totient is φ = 9414192.

The previous prime is 19161913. The next prime is 19161929. The reversal of 19161914 is 41916191.

It is not an unprimeable number, because it can be changed into a prime (19161913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34124 + ... + 34680.

It is an arithmetic number, because the mean of its divisors is an integer number (1828008).

Almost surely, 2^19161914 is an apocalyptic number.

19161914 is a deficient number, since it is larger than the sum of its proper divisors (10086214).

19161914 is a wasteful number, since it uses less digits than its factorization.

19161914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its digits is 1944, while the sum is 32.

The square root of 19161914 is about 4377.4323524185. The cubic root of 19161914 is about 267.5960071141.

The spelling of 19161914 in words is "nineteen million, one hundred sixty-one thousand, nine hundred fourteen".