18329913 has 24 divisors (see below), whose sum is σ = 30503616. Its totient is φ = 10389600.

The previous prime is 18329903. The next prime is 18329923. The reversal of 18329913 is 31992381.

It is an interprime number because it is at equal distance from previous prime (18329903) and next prime (18329923).

It is not a de Polignac number, because 18329913 - 2⁵ = 18329881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18329903) 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 23 ways as a sum of consecutive naturals, for example, 7143 + ... + 9363.

It is an arithmetic number, because the mean of its divisors is an integer number (1270984).

Almost surely, 2^18329913 is an apocalyptic number.

It is an amenable number.

18329913 is a deficient number, since it is larger than the sum of its proper divisors (12173703).

18329913 is a wasteful number, since it uses less digits than its factorization.

18329913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365 (or 2362 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 18329913 is about 4281.3447653745. The cubic root of 18329913 is about 263.6655976050.

The spelling of 18329913 in words is "eighteen million, three hundred twenty-nine thousand, nine hundred thirteen".