19849746 has 64 divisors (see below), whose sum is σ = 48153600. Its totient is φ = 5334336.

The previous prime is 19849679. The next prime is 19849747. The reversal of 19849746 is 64794891.

It is a junction number, because it is equal to n+sod(n) for n = 19849695 and 19849704.

It is not an unprimeable number, because it can be changed into a prime (19849747) 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 31 ways as a sum of consecutive naturals, for example, 52185 + ... + 52563.

It is an arithmetic number, because the mean of its divisors is an integer number (752400).

Almost surely, 2^19849746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19849746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24076800).

19849746 is an abundant number, since it is smaller than the sum of its proper divisors (28303854).

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

19849746 is a wasteful number, since it uses less digits than its factorization.

19849746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its digits is 435456, while the sum is 48.

The square root of 19849746 is about 4455.3053767391. The cubic root of 19849746 is about 270.7602987499.

The spelling of 19849746 in words is "nineteen million, eight hundred forty-nine thousand, seven hundred forty-six".