19894065 has 8 divisors (see below), whose sum is σ = 31830528. Its totient is φ = 10610160.

The previous prime is 19894031. The next prime is 19894073. The reversal of 19894065 is 56049891.

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

It is not a de Polignac number, because 19894065 - 2⁶ = 19894001 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663121 + ... + 663150.

It is an arithmetic number, because the mean of its divisors is an integer number (3978816).

Almost surely, 2^19894065 is an apocalyptic number.

19894065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19894065 is a deficient number, since it is larger than the sum of its proper divisors (11936463).

19894065 is a wasteful number, since it uses less digits than its factorization.

19894065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326279.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 19894065 is about 4460.2763367307. The cubic root of 19894065 is about 270.9616599492.

The spelling of 19894065 in words is "nineteen million, eight hundred ninety-four thousand, sixty-five".