18934643 has 8 divisors (see below), whose sum is σ = 23304288. Its totient is φ = 14981184.

The previous prime is 18934637. The next prime is 18934649. The reversal of 18934643 is 34643981.

It is an interprime number because it is at equal distance from previous prime (18934637) and next prime (18934649).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18934643 - 2¹⁰ = 18933619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18934597 and 18934606.

It is not an unprimeable number, because it can be changed into a prime (18934649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103946 + ... + 104127.

It is an arithmetic number, because the mean of its divisors is an integer number (2913036).

Almost surely, 2^18934643 is an apocalyptic number.

18934643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18934643 is a deficient number, since it is larger than the sum of its proper divisors (4369645).

18934643 is a wasteful number, since it uses less digits than its factorization.

18934643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208093.

The product of its digits is 62208, while the sum is 38.

The square root of 18934643 is about 4351.3955232776. The cubic root of 18934643 is about 266.5338507010.

The spelling of 18934643 in words is "eighteen million, nine hundred thirty-four thousand, six hundred forty-three".