19849842 has 24 divisors (see below), whose sum is σ = 43739280. Its totient is φ = 6504120.

The previous prime is 19849807. The next prime is 19849849. The reversal of 19849842 is 24894891.

It is not an unprimeable number, because it can be changed into a prime (19849849) 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 11 ways as a sum of consecutive naturals, for example, 8284 + ... + 10407.

It is an arithmetic number, because the mean of its divisors is an integer number (1822470).

Almost surely, 2^19849842 is an apocalyptic number.

19849842 is an abundant number, since it is smaller than the sum of its proper divisors (23889438).

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

19849842 is a wasteful number, since it uses less digits than its factorization.

19849842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18758 (or 18755 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 19849842 is about 4455.3161503983. The cubic root of 19849842 is about 270.7607352450.

The spelling of 19849842 in words is "nineteen million, eight hundred forty-nine thousand, eight hundred forty-two".