19965417 has 8 divisors (see below), whose sum is σ = 26879424. Its totient is φ = 13180848.

The previous prime is 19965391. The next prime is 19965419. The reversal of 19965417 is 71456991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19965417 - 2⁶ = 19965353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19965419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31998 + ... + 32615.

It is an arithmetic number, because the mean of its divisors is an integer number (3359928).

Almost surely, 2^19965417 is an apocalyptic number.

It is an amenable number.

19965417 is a deficient number, since it is larger than the sum of its proper divisors (6914007).

19965417 is a wasteful number, since it uses less digits than its factorization.

19965417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64719.

The product of its digits is 68040, while the sum is 42.

The square root of 19965417 is about 4468.2677851713. The cubic root of 19965417 is about 271.2852168876.

The spelling of 19965417 in words is "nineteen million, nine hundred sixty-five thousand, four hundred seventeen".