19042340 has 12 divisors (see below), whose sum is σ = 39988956. Its totient is φ = 7616928.

The previous prime is 19042333. The next prime is 19042343. The reversal of 19042340 is 4324091.

It can be written as a sum of positive squares in 2 ways, for example, as 7806436 + 11235904 = 2794^2 + 3352^2 .

It is a super-2 number, since 2×19042340² = 725221425351200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19042343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476039 + ... + 476078.

It is an arithmetic number, because the mean of its divisors is an integer number (3332413).

Almost surely, 2^19042340 is an apocalyptic number.

19042340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19042340 is an abundant number, since it is smaller than the sum of its proper divisors (20946616).

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

19042340 is a wasteful number, since it uses less digits than its factorization.

19042340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952126 (or 952124 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 19042340 is about 4363.7529719268. The cubic root of 19042340 is about 267.0382285689.

The spelling of 19042340 in words is "nineteen million, forty-two thousand, three hundred forty".