18413929 has 2 divisors, whose sum is σ = 18413930. Its totient is φ = 18413928.

The previous prime is 18413911. The next prime is 18413963. The reversal of 18413929 is 92931481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17413929 + 1000000 = 4173^2 + 1000^2 .

It is an emirp because it is prime and its reverse (92931481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18413929 - 2⁵ = 18413897 is a prime.

It is not a weakly prime, because it can be changed into another prime (18413029) 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 as a sum of consecutive naturals, namely, 9206964 + 9206965.

It is an arithmetic number, because the mean of its divisors is an integer number (9206965).

Almost surely, 2^18413929 is an apocalyptic number.

It is an amenable number.

18413929 is a deficient number, since it is larger than the sum of its proper divisors (1).

18413929 is an equidigital number, since it uses as much as digits as its factorization.

18413929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 18413929 is about 4291.1454181838. The cubic root of 18413929 is about 264.0678248217.

The spelling of 18413929 in words is "eighteen million, four hundred thirteen thousand, nine hundred twenty-nine".