19806948 has 72 divisors (see below), whose sum is σ = 58339008. Its totient is φ = 5548608.

The previous prime is 19806937. The next prime is 19806967. The reversal of 19806948 is 84960891.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12615 + ... + 14097.

It is an arithmetic number, because the mean of its divisors is an integer number (810264).

Almost surely, 2^19806948 is an apocalyptic number.

19806948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19806948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29169504).

19806948 is an abundant number, since it is smaller than the sum of its proper divisors (38532060).

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

19806948 is a wasteful number, since it uses less digits than its factorization.

19806948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1548 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 19806948 is about 4450.4997472194. The cubic root of 19806948 is about 270.5655634698.

The spelling of 19806948 in words is "nineteen million, eight hundred six thousand, nine hundred forty-eight".