18699311 has 2 divisors, whose sum is σ = 18699312. Its totient is φ = 18699310.

The previous prime is 18699259. The next prime is 18699313. The reversal of 18699311 is 11399681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18699311 is a prime.

Together with 18699313, 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 (18699313) 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 as a sum of consecutive naturals, namely, 9349655 + 9349656.

It is an arithmetic number, because the mean of its divisors is an integer number (9349656).

Almost surely, 2^18699311 is an apocalyptic number.

18699311 is a deficient number, since it is larger than the sum of its proper divisors (1).

18699311 is an equidigital number, since it uses as much as digits as its factorization.

18699311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 38.

The square root of 18699311 is about 4324.2699961959. The cubic root of 18699311 is about 265.4250257929.

The spelling of 18699311 in words is "eighteen million, six hundred ninety-nine thousand, three hundred eleven".