18801416 has 16 divisors (see below), whose sum is σ = 35491500. Its totient is φ = 9337024.

The previous prime is 18801403. The next prime is 18801443. The reversal of 18801416 is 61410881.

It can be written as a sum of positive squares in 2 ways, for example, as 18232900 + 568516 = 4270^2 + 754^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6695 + ... + 9078.

Almost surely, 2^18801416 is an apocalyptic number.

It is an amenable number.

18801416 is a deficient number, since it is larger than the sum of its proper divisors (16690084).

18801416 is a wasteful number, since it uses less digits than its factorization.

18801416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15928 (or 15924 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 18801416 is about 4336.0599626850. The cubic root of 18801416 is about 265.9072546811.

The spelling of 18801416 in words is "eighteen million, eight hundred one thousand, four hundred sixteen".