19842444 has 18 divisors (see below), whose sum is σ = 50157380. Its totient is φ = 6614136.

The previous prime is 19842443. The next prime is 19842463. The reversal of 19842444 is 44424891.

19842444 is a `hidden beast` number, since 198 + 424 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 551179 = 19842444 / (1 + 9 + 8 + 4 + 2 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 19842399 and 19842408.

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 5 ways as a sum of consecutive naturals, for example, 275554 + ... + 275625.

Almost surely, 2^19842444 is an apocalyptic number.

It is an amenable number.

19842444 is an abundant number, since it is smaller than the sum of its proper divisors (30314936).

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

19842444 is a wasteful number, since it uses less digits than its factorization.

19842444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551189 (or 551184 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 19842444 is about 4454.4858289145. The cubic root of 19842444 is about 270.7270937208.

The spelling of 19842444 in words is "nineteen million, eight hundred forty-two thousand, four hundred forty-four".