18266408 has 8 divisors (see below), whose sum is σ = 34249530. Its totient is φ = 9133200.

The previous prime is 18266401. The next prime is 18266441. The reversal of 18266408 is 80466281.

It can be written as a sum of positive squares in only one way, i.e., 17623204 + 643204 = 4198^2 + 802^2 .

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

It is a super-2 number, since 2×18266408² = 667323322444928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18266401) by changing a digit.

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 as a sum of consecutive naturals, namely, 1141643 + ... + 1141658.

Almost surely, 2^18266408 is an apocalyptic number.

It is an amenable number.

18266408 is a deficient number, since it is larger than the sum of its proper divisors (15983122).

18266408 is a wasteful number, since it uses less digits than its factorization.

18266408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283307 (or 2283303 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 18266408 is about 4273.9218523506. The cubic root of 18266408 is about 263.3607505858.

The spelling of 18266408 in words is "eighteen million, two hundred sixty-six thousand, four hundred eight".