18485416 has 8 divisors (see below), whose sum is σ = 34660170. Its totient is φ = 9242704.

The previous prime is 18485413. The next prime is 18485417. The reversal of 18485416 is 61458481.

18485416 = T₃₅₀₉ + T₃₅₁₀ + T₃₅₁₁.

It can be written as a sum of positive squares in only one way, i.e., 11249316 + 7236100 = 3354^2 + 2690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18485413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155331 + ... + 1155346.

Almost surely, 2^18485416 is an apocalyptic number.

18485416 is the 3511-st centered triangular number.

It is an amenable number.

18485416 is a deficient number, since it is larger than the sum of its proper divisors (16174754).

18485416 is a wasteful number, since it uses less digits than its factorization.

18485416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310683 (or 2310679 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 18485416 is about 4299.4669437036. The cubic root of 18485416 is about 264.4091070535.

The spelling of 18485416 in words is "eighteen million, four hundred eighty-five thousand, four hundred sixteen".