19135138 has 8 divisors (see below), whose sum is σ = 31312080. Its totient is φ = 8697780.

The previous prime is 19135121. The next prime is 19135141. The reversal of 19135138 is 83153191.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434868 + ... + 434911.

It is an arithmetic number, because the mean of its divisors is an integer number (3914010).

Almost surely, 2^19135138 is an apocalyptic number.

19135138 is a deficient number, since it is larger than the sum of its proper divisors (12176942).

19135138 is a wasteful number, since it uses less digits than its factorization.

19135138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869792.

The product of its digits is 3240, while the sum is 31.

The square root of 19135138 is about 4374.3728693380. The cubic root of 19135138 is about 267.4713067893.

The spelling of 19135138 in words is "nineteen million, one hundred thirty-five thousand, one hundred thirty-eight".