18680351 has 2 divisors, whose sum is σ = 18680352. Its totient is φ = 18680350.

The previous prime is 18680323. The next prime is 18680353. The reversal of 18680351 is 15308681.

It is a strong prime.

It is an emirp because it is prime and its reverse (15308681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18680351 - 2¹⁰ = 18679327 is a prime.

Together with 18680353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18680353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9340175 + 9340176.

It is an arithmetic number, because the mean of its divisors is an integer number (9340176).

Almost surely, 2^18680351 is an apocalyptic number.

18680351 is a deficient number, since it is larger than the sum of its proper divisors (1).

18680351 is an equidigital number, since it uses as much as digits as its factorization.

18680351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18680351 is about 4322.0771626615. The cubic root of 18680351 is about 265.3352870084.

The spelling of 18680351 in words is "eighteen million, six hundred eighty thousand, three hundred fifty-one".