18791148 has 12 divisors (see below), whose sum is σ = 43846040. Its totient is φ = 6263712.

The previous prime is 18791147. The next prime is 18791167. The reversal of 18791148 is 84119781.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18791141) 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, 782953 + ... + 782976.

Almost surely, 2^18791148 is an apocalyptic number.

It is an amenable number.

18791148 is an abundant number, since it is smaller than the sum of its proper divisors (25054892).

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

18791148 is a wasteful number, since it uses less digits than its factorization.

18791148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565936 (or 1565934 counting only the distinct ones).

The product of its digits is 16128, while the sum is 39.

The square root of 18791148 is about 4334.8757767668. The cubic root of 18791148 is about 265.8588393050.

The spelling of 18791148 in words is "eighteen million, seven hundred ninety-one thousand, one hundred forty-eight".