19115089 has 24 divisors (see below), whose sum is σ = 24081408. Its totient is φ = 14810880.

The previous prime is 19115081. The next prime is 19115113. The reversal of 19115089 is 98051191.

It is not a de Polignac number, because 19115089 - 2³ = 19115081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19115081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99984 + ... + 100174.

It is an arithmetic number, because the mean of its divisors is an integer number (1003392).

Almost surely, 2^19115089 is an apocalyptic number.

It is an amenable number.

19115089 is a deficient number, since it is larger than the sum of its proper divisors (4966319).

19115089 is a wasteful number, since it uses less digits than its factorization.

19115089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 19115089 is about 4372.0806259720. The cubic root of 19115089 is about 267.3778590493.

The spelling of 19115089 in words is "nineteen million, one hundred fifteen thousand, eighty-nine".