18061699 has 2 divisors, whose sum is σ = 18061700. Its totient is φ = 18061698.

The previous prime is 18061679. The next prime is 18061721. The reversal of 18061699 is 99616081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18061699 - 2¹⁵ = 18028931 is a prime.

It is not a weakly prime, because it can be changed into another prime (18061639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9030849 + 9030850.

It is an arithmetic number, because the mean of its divisors is an integer number (9030850).

Almost surely, 2^18061699 is an apocalyptic number.

18061699 is a deficient number, since it is larger than the sum of its proper divisors (1).

18061699 is an equidigital number, since it uses as much as digits as its factorization.

18061699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 18061699 is about 4249.9057636611. The cubic root of 18061699 is about 262.3732370567.

The spelling of 18061699 in words is "eighteen million, sixty-one thousand, six hundred ninety-nine".