19138474 has 8 divisors (see below), whose sum is σ = 28747908. Its totient is φ = 9555840.

The previous prime is 19138433. The next prime is 19138487. The reversal of 19138474 is 47483191.

It can be written as a sum of positive squares in 2 ways, for example, as 17164449 + 1974025 = 4143^2 + 1405^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4807 + ... + 7834.

Almost surely, 2^19138474 is an apocalyptic number.

19138474 is a deficient number, since it is larger than the sum of its proper divisors (9609434).

19138474 is a wasteful number, since it uses less digits than its factorization.

19138474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13400.

The product of its digits is 24192, while the sum is 37.

The square root of 19138474 is about 4374.7541645217. The cubic root of 19138474 is about 267.4868494423.

The spelling of 19138474 in words is "nineteen million, one hundred thirty-eight thousand, four hundred seventy-four".