19789748 has 12 divisors (see below), whose sum is σ = 37780512. Its totient is φ = 8995320.

The previous prime is 19789747. The next prime is 19789753. The reversal of 19789748 is 84798791.

It is a self number, because there is not a number n which added to its sum of digits gives 19789748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19789747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224840 + ... + 224927.

It is an arithmetic number, because the mean of its divisors is an integer number (3148376).

Almost surely, 2^19789748 is an apocalyptic number.

It is an amenable number.

19789748 is a deficient number, since it is larger than the sum of its proper divisors (17990764).

19789748 is a wasteful number, since it uses less digits than its factorization.

19789748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449782 (or 449780 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 53.

The square root of 19789748 is about 4448.5669602693. The cubic root of 19789748 is about 270.4872226873.

The spelling of 19789748 in words is "nineteen million, seven hundred eighty-nine thousand, seven hundred forty-eight".