18010999 has 2 divisors, whose sum is σ = 18011000. Its totient is φ = 18010998.

The previous prime is 18010997. The next prime is 18011009. The reversal of 18010999 is 99901081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18010999 - 2¹ = 18010997 is a prime.

Together with 18010997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18010991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005499 + 9005500.

It is an arithmetic number, because the mean of its divisors is an integer number (9005500).

Almost surely, 2^18010999 is an apocalyptic number.

18010999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18010999 is an equidigital number, since it uses as much as digits as its factorization.

18010999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 18010999 is about 4243.9367337414. The cubic root of 18010999 is about 262.1275091714.

The spelling of 18010999 in words is "eighteen million, ten thousand, nine hundred ninety-nine".