19112742 has 48 divisors (see below), whose sum is σ = 45759168. Its totient is φ = 5717040.

The previous prime is 19112741. The next prime is 19112749. The reversal of 19112742 is 24721191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19112741) 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, 15853 + ... + 17015.

It is an arithmetic number, because the mean of its divisors is an integer number (953316).

Almost surely, 2^19112742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19112742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22879584).

19112742 is an abundant number, since it is smaller than the sum of its proper divisors (26646426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19112742 is a wasteful number, since it uses less digits than its factorization.

19112742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265 (or 1262 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 19112742 is about 4371.8122100566. The cubic root of 19112742 is about 267.3669154867.

The spelling of 19112742 in words is "nineteen million, one hundred twelve thousand, seven hundred forty-two".