19368909 has 16 divisors (see below), whose sum is σ = 32794240. Its totient is φ = 11067840.

The previous prime is 19368887. The next prime is 19368913. The reversal of 19368909 is 90986391.

It is not a de Polignac number, because 19368909 - 2¹¹ = 19366861 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19368919) 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, 51052 + ... + 51429.

It is an arithmetic number, because the mean of its divisors is an integer number (2049640).

Almost surely, 2^19368909 is an apocalyptic number.

It is an amenable number.

19368909 is a deficient number, since it is larger than the sum of its proper divisors (13425331).

19368909 is a wasteful number, since it uses less digits than its factorization.

19368909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102497 (or 102491 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 19368909 is about 4401.0122699215. The cubic root of 19368909 is about 268.5561194765.

The spelling of 19368909 in words is "nineteen million, three hundred sixty-eight thousand, nine hundred nine".