18447116 has 6 divisors (see below), whose sum is σ = 32282460. Its totient is φ = 9223556.

The previous prime is 18447109. The next prime is 18447223. The reversal of 18447116 is 61174481.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2305886 + ... + 2305893.

It is an arithmetic number, because the mean of its divisors is an integer number (5380410).

Almost surely, 2^18447116 is an apocalyptic number.

It is an amenable number.

18447116 is a deficient number, since it is larger than the sum of its proper divisors (13835344).

18447116 is a wasteful number, since it uses less digits than its factorization.

18447116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611783 (or 4611781 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 18447116 is about 4295.0105937006. The cubic root of 18447116 is about 264.2263707309.

The spelling of 18447116 in words is "eighteen million, four hundred forty-seven thousand, one hundred sixteen".