19894119 has 16 divisors (see below), whose sum is σ = 30378240. Its totient is φ = 11344320.

The previous prime is 19894111. The next prime is 19894139. The reversal of 19894119 is 91149891.

It is a happy number.

It is not a de Polignac number, because 19894119 - 2³ = 19894111 is a prime.

It is a super-2 number, since 2×19894119² = 791551941572322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16404 + ... + 17574.

It is an arithmetic number, because the mean of its divisors is an integer number (1898640).

Almost surely, 2^19894119 is an apocalyptic number.

19894119 is a deficient number, since it is larger than the sum of its proper divisors (10484121).

19894119 is a wasteful number, since it uses less digits than its factorization.

19894119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its digits is 23328, while the sum is 42.

The square root of 19894119 is about 4460.2823901632. The cubic root of 19894119 is about 270.9619051130.

The spelling of 19894119 in words is "nineteen million, eight hundred ninety-four thousand, one hundred nineteen".