18003948 has 24 divisors (see below), whose sum is σ = 42083328. Its totient is φ = 5990736.

The previous prime is 18003913. The next prime is 18003949. The reversal of 18003948 is 84930081.

It is not an unprimeable number, because it can be changed into a prime (18003949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8965 + ... + 10787.

It is an arithmetic number, because the mean of its divisors is an integer number (1753472).

Almost surely, 2^18003948 is an apocalyptic number.

It is an amenable number.

18003948 is an abundant number, since it is smaller than the sum of its proper divisors (24079380).

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

18003948 is a wasteful number, since it uses less digits than its factorization.

18003948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18003948 is about 4243.1059378715. The cubic root of 18003948 is about 262.0932985517.

The spelling of 18003948 in words is "eighteen million, three thousand, nine hundred forty-eight".