18199013 has 4 divisors (see below), whose sum is σ = 20798880. Its totient is φ = 15599148.

The previous prime is 18198977. The next prime is 18199031. The reversal of 18199013 is 31099181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18199013 - 2⁸ = 18198757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199063) 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 in 3 ways as a sum of consecutive naturals, for example, 1299923 + ... + 1299936.

It is an arithmetic number, because the mean of its divisors is an integer number (5199720).

Almost surely, 2^18199013 is an apocalyptic number.

It is an amenable number.

18199013 is a deficient number, since it is larger than the sum of its proper divisors (2599867).

18199013 is an equidigital number, since it uses as much as digits as its factorization.

18199013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599866.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 18199013 is about 4266.0301217877. The cubic root of 18199013 is about 263.0364563669.

The spelling of 18199013 in words is "eighteen million, one hundred ninety-nine thousand, thirteen".