18498811 has 2 divisors, whose sum is σ = 18498812. Its totient is φ = 18498810.

The previous prime is 18498803. The next prime is 18498817. The reversal of 18498811 is 11889481.

It is a strong prime.

It is an emirp because it is prime and its reverse (11889481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18498811 - 2³ = 18498803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18498817) 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, 9249405 + 9249406.

It is an arithmetic number, because the mean of its divisors is an integer number (9249406).

Almost surely, 2^18498811 is an apocalyptic number.

18498811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18498811 is an equidigital number, since it uses as much as digits as its factorization.

18498811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 40.

The square root of 18498811 is about 4301.0244128579. The cubic root of 18498811 is about 264.4729574758.

The spelling of 18498811 in words is "eighteen million, four hundred ninety-eight thousand, eight hundred eleven".