18124889 has 2 divisors, whose sum is σ = 18124890. Its totient is φ = 18124888.

The previous prime is 18124877. The next prime is 18124901. The reversal of 18124889 is 98842181.

It is a balanced prime because it is at equal distance from previous prime (18124877) and next prime (18124901).

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 6801664 = 3365^2 + 2608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18124889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18124819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062444 + 9062445.

It is an arithmetic number, because the mean of its divisors is an integer number (9062445).

Almost surely, 2^18124889 is an apocalyptic number.

It is an amenable number.

18124889 is a deficient number, since it is larger than the sum of its proper divisors (1).

18124889 is an equidigital number, since it uses as much as digits as its factorization.

18124889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 41.

The square root of 18124889 is about 4257.3335551728. Note that the first 3 decimals coincide. The cubic root of 18124889 is about 262.6788573953.

The spelling of 18124889 in words is "eighteen million, one hundred twenty-four thousand, eight hundred eighty-nine".