19776948 has 48 divisors (see below), whose sum is σ = 49029120. Its totient is φ = 6187104.

The previous prime is 19776937. The next prime is 19776949. The reversal of 19776948 is 84967791.

It is a super-2 number, since 2×19776948² = 782255344389408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19776948.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19776949) 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, 28615 + ... + 29297.

It is an arithmetic number, because the mean of its divisors is an integer number (1021440).

Almost surely, 2^19776948 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 19776948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24514560).

19776948 is an abundant number, since it is smaller than the sum of its proper divisors (29252172).

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

19776948 is a wasteful number, since it uses less digits than its factorization.

19776948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836 (or 834 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 19776948 is about 4447.1280620194. The cubic root of 19776948 is about 270.4288931055.

The spelling of 19776948 in words is "nineteen million, seven hundred seventy-six thousand, nine hundred forty-eight".