18068643 has 32 divisors (see below), whose sum is σ = 27878400. Its totient is φ = 11557728.

The previous prime is 18068621. The next prime is 18068647. The reversal of 18068643 is 34686081.

It is a happy number.

18068643 is a `hidden beast` number, since 1 + 8 + 0 + 6 + 8 + 643 = 666.

It is not a de Polignac number, because 18068643 - 2⁶ = 18068579 is a prime.

It is a super-2 number, since 2×18068643² = 652951719722898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18068598 and 18068607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18068647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91621 + ... + 91817.

It is an arithmetic number, because the mean of its divisors is an integer number (871200).

Almost surely, 2^18068643 is an apocalyptic number.

18068643 is a deficient number, since it is larger than the sum of its proper divisors (9809757).

18068643 is a wasteful number, since it uses less digits than its factorization.

18068643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18068643 is about 4250.7226444453. The cubic root of 18068643 is about 262.4068567497.

The spelling of 18068643 in words is "eighteen million, sixty-eight thousand, six hundred forty-three".