19849956 has 48 divisors (see below), whose sum is σ = 53738496. Its totient is φ = 5585184.

The previous prime is 19849939. The next prime is 19849957. The reversal of 19849956 is 65994891.

It is a junction number, because it is equal to n+sod(n) for n = 19849899 and 19849908.

It is not an unprimeable number, because it can be changed into a prime (19849957) 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 15 ways as a sum of consecutive naturals, for example, 3865 + ... + 7391.

It is an arithmetic number, because the mean of its divisors is an integer number (1119552).

Almost surely, 2^19849956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19849956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26869248).

19849956 is an abundant number, since it is smaller than the sum of its proper divisors (33888540).

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

19849956 is a wasteful number, since it uses less digits than its factorization.

19849956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608 (or 3606 counting only the distinct ones).

The product of its digits is 699840, while the sum is 51.

The square root of 19849956 is about 4455.3289440848. The cubic root of 19849956 is about 270.7612535810.

The spelling of 19849956 in words is "nineteen million, eight hundred forty-nine thousand, nine hundred fifty-six".