19085565 has 16 divisors (see below), whose sum is σ = 31114368. Its totient is φ = 9986496.

The previous prime is 19085527. The next prime is 19085569. The reversal of 19085565 is 56558091.

It is not a de Polignac number, because 19085565 - 2⁶ = 19085501 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19085569) 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, 11209 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (1944648).

Almost surely, 2^19085565 is an apocalyptic number.

19085565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19085565 is a deficient number, since it is larger than the sum of its proper divisors (12028803).

19085565 is a wasteful number, since it uses less digits than its factorization.

19085565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24068.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 19085565 is about 4368.7028967418. The cubic root of 19085565 is about 267.2401296072.

The spelling of 19085565 in words is "nineteen million, eighty-five thousand, five hundred sixty-five".