18929449 has 16 divisors (see below), whose sum is σ = 24990336. Its totient is φ = 13881600.

The previous prime is 18929447. The next prime is 18929473. The reversal of 18929449 is 94492981.

It is a cyclic number.

It is not a de Polignac number, because 18929449 - 2¹ = 18929447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18929399 and 18929408.

It is not an unprimeable number, because it can be changed into a prime (18929441) 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 in 15 ways as a sum of consecutive naturals, for example, 5922 + ... + 8539.

It is an arithmetic number, because the mean of its divisors is an integer number (1561896).

Almost surely, 2^18929449 is an apocalyptic number.

It is an amenable number.

18929449 is a deficient number, since it is larger than the sum of its proper divisors (6060887).

18929449 is a wasteful number, since it uses less digits than its factorization.

18929449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14496.

The product of its digits is 186624, while the sum is 46.

The square root of 18929449 is about 4350.7986623148. The cubic root of 18929449 is about 266.5094773267.

The spelling of 18929449 in words is "eighteen million, nine hundred twenty-nine thousand, four hundred forty-nine".