18847968 has 48 divisors (see below), whose sum is σ = 52390800. Its totient is φ = 5912576.

The previous prime is 18847937. The next prime is 18847991. The reversal of 18847968 is 86974881.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 18847968.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4143 + ... + 7406.

It is an arithmetic number, because the mean of its divisors is an integer number (1091475).

Almost surely, 2^18847968 is an apocalyptic number.

It is an amenable number.

18847968 is an abundant number, since it is smaller than the sum of its proper divisors (33542832).

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

18847968 is a wasteful number, since it uses less digits than its factorization.

18847968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11579 (or 11571 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 18847968 is about 4341.4246509642. The cubic root of 18847968 is about 266.1265344810.

The spelling of 18847968 in words is "eighteen million, eight hundred forty-seven thousand, nine hundred sixty-eight".