18055968 has 96 divisors (see below), whose sum is σ = 54923904. Its totient is φ = 5087232.

The previous prime is 18055927. The next prime is 18055993. The reversal of 18055968 is 86955081.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65046 + ... + 65322.

It is an arithmetic number, because the mean of its divisors is an integer number (572124).

Almost surely, 2^18055968 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 18055968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27461952).

18055968 is an abundant number, since it is smaller than the sum of its proper divisors (36867936).

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

18055968 is a wasteful number, since it uses less digits than its factorization.

18055968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 18055968 is about 4249.2314599231. The cubic root of 18055968 is about 262.3454836675.

The spelling of 18055968 in words is "eighteen million, fifty-five thousand, nine hundred sixty-eight".