19147742 has 8 divisors (see below), whose sum is σ = 29208600. Its totient is φ = 9411544.

The previous prime is 19147741. The next prime is 19147769. The reversal of 19147742 is 24774191.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19147741) by changing a digit.

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, 81017 + ... + 81252.

It is an arithmetic number, because the mean of its divisors is an integer number (3651075).

Almost surely, 2^19147742 is an apocalyptic number.

19147742 is a deficient number, since it is larger than the sum of its proper divisors (10060858).

19147742 is a wasteful number, since it uses less digits than its factorization.

19147742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162330.

The product of its digits is 14112, while the sum is 35.

The square root of 19147742 is about 4375.8132958343. The cubic root of 19147742 is about 267.5300202137.

The spelling of 19147742 in words is "nineteen million, one hundred forty-seven thousand, seven hundred forty-two".