19388134 has 4 divisors (see below), whose sum is σ = 29082204. Its totient is φ = 9694066.

The previous prime is 19388123. The next prime is 19388147. The reversal of 19388134 is 43188391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43188391 = 3691 ⋅11701.

It is a junction number, because it is equal to n+sod(n) for n = 19388093 and 19388102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4847032 + ... + 4847035.

It is an arithmetic number, because the mean of its divisors is an integer number (7270551).

Almost surely, 2^19388134 is an apocalyptic number.

19388134 is a deficient number, since it is larger than the sum of its proper divisors (9694070).

19388134 is an equidigital number, since it uses as much as digits as its factorization.

19388134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9694069.

The product of its digits is 20736, while the sum is 37.

The square root of 19388134 is about 4403.1958848091. The cubic root of 19388134 is about 268.6449436866.

The spelling of 19388134 in words is "nineteen million, three hundred eighty-eight thousand, one hundred thirty-four".