19085913 has 24 divisors (see below), whose sum is σ = 34372416. Its totient is φ = 9914400.

The previous prime is 19085909. The next prime is 19085953. The reversal of 19085913 is 31958091.

It is a happy number.

It is not a de Polignac number, because 19085913 - 2² = 19085909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19085903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13078 + ... + 14463.

It is an arithmetic number, because the mean of its divisors is an integer number (1432184).

Almost surely, 2^19085913 is an apocalyptic number.

It is an amenable number.

19085913 is a deficient number, since it is larger than the sum of its proper divisors (15286503).

19085913 is a wasteful number, since it uses less digits than its factorization.

19085913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27565 (or 27562 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 19085913 is about 4368.7427253158. The cubic root of 19085913 is about 267.2417538540.

The spelling of 19085913 in words is "nineteen million, eighty-five thousand, nine hundred thirteen".