18197008 has 10 divisors (see below), whose sum is σ = 35256734. Its totient is φ = 9098496.

The previous prime is 18196993. The next prime is 18197009. The reversal of 18197008 is 80079181.

It can be written as a sum of positive squares in only one way, i.e., 11478544 + 6718464 = 3388^2 + 2592^2 .

It is a super-2 number, since 2×18197008² = 662262200304128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18197009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568641 + ... + 568672.

Almost surely, 2^18197008 is an apocalyptic number.

It is an amenable number.

18197008 is a deficient number, since it is larger than the sum of its proper divisors (17059726).

18197008 is a wasteful number, since it uses less digits than its factorization.

18197008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137321 (or 1137315 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 18197008 is about 4265.7951193183. The cubic root of 18197008 is about 263.0267963656.

The spelling of 18197008 in words is "eighteen million, one hundred ninety-seven thousand, eight".