18491148 has 36 divisors (see below), whose sum is σ = 50338288. Its totient is φ = 5689440.

The previous prime is 18491147. The next prime is 18491173. The reversal of 18491148 is 84119481.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18491147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19288 + ... + 20223.

Almost surely, 2^18491148 is an apocalyptic number.

18491148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18491148 is an abundant number, since it is smaller than the sum of its proper divisors (31847140).

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

18491148 is a wasteful number, since it uses less digits than its factorization.

18491148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39534 (or 39529 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 18491148 is about 4300.1334863002. The cubic root of 18491148 is about 264.4364337558.

The spelling of 18491148 in words is "eighteen million, four hundred ninety-one thousand, one hundred forty-eight".