19842442 has 8 divisors (see below), whose sum is σ = 30489732. Its totient is φ = 9679200.

The previous prime is 19842391. The next prime is 19842443. The reversal of 19842442 is 24424891.

It can be written as a sum of positive squares in 2 ways, for example, as 19793601 + 48841 = 4449^2 + 221^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 19842398 and 19842407.

It is not an unprimeable number, because it can be changed into a prime (19842443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120909 + ... + 121072.

Almost surely, 2^19842442 is an apocalyptic number.

19842442 is a deficient number, since it is larger than the sum of its proper divisors (10647290).

19842442 is a wasteful number, since it uses less digits than its factorization.

19842442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242024.

The product of its digits is 18432, while the sum is 34.

The square root of 19842442 is about 4454.4856044217. The cubic root of 19842442 is about 270.7270846249.

The spelling of 19842442 in words is "nineteen million, eight hundred forty-two thousand, four hundred forty-two".