18644068 has 6 divisors (see below), whose sum is σ = 32627126. Its totient is φ = 9322032.

The previous prime is 18644063. The next prime is 18644107. The reversal of 18644068 is 86044681.

It can be written as a sum of positive squares in only one way, i.e., 9535744 + 9108324 = 3088^2 + 3018^2 .

It is not an unprimeable number, because it can be changed into a prime (18644063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2330505 + ... + 2330512.

Almost surely, 2^18644068 is an apocalyptic number.

It is an amenable number.

18644068 is a deficient number, since it is larger than the sum of its proper divisors (13983058).

18644068 is a wasteful number, since it uses less digits than its factorization.

18644068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4661021 (or 4661019 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 18644068 is about 4317.8777194358. The cubic root of 18644068 is about 265.1633880270.

The spelling of 18644068 in words is "eighteen million, six hundred forty-four thousand, sixty-eight".