18634343 has 16 divisors (see below), whose sum is σ = 23075136. Its totient is φ = 14653440.

The previous prime is 18634337. The next prime is 18634367. The reversal of 18634343 is 34343681.

It is a cyclic number.

It is not a de Polignac number, because 18634343 - 2⁶ = 18634279 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18634333) 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 15 ways as a sum of consecutive naturals, for example, 17033 + ... + 18093.

It is an arithmetic number, because the mean of its divisors is an integer number (1442196).

Almost surely, 2^18634343 is an apocalyptic number.

18634343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18634343 is a deficient number, since it is larger than the sum of its proper divisors (4440793).

18634343 is a wasteful number, since it uses less digits than its factorization.

18634343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274.

The product of its digits is 20736, while the sum is 32.

The square root of 18634343 is about 4316.7514406090. The cubic root of 18634343 is about 265.1172757293.

The spelling of 18634343 in words is "eighteen million, six hundred thirty-four thousand, three hundred forty-three".