18429673 has 6 divisors (see below), whose sum is σ = 18672234. Its totient is φ = 18190224.

The previous prime is 18429629. The next prime is 18429679. The reversal of 18429673 is 37692481.

It can be written as a sum of positive squares in only one way, i.e., 17530969 + 898704 = 4187^2 + 948^2 .

It is not a de Polignac number, because 18429673 - 2⁹ = 18429161 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 (18429679) 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 5 ways as a sum of consecutive naturals, for example, 4765 + ... + 7717.

It is an arithmetic number, because the mean of its divisors is an integer number (3112039).

Almost surely, 2^18429673 is an apocalyptic number.

It is an amenable number.

18429673 is a deficient number, since it is larger than the sum of its proper divisors (242561).

18429673 is an frugal number, since it uses more digits than its factorization.

18429673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111 (or 3032 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 18429673 is about 4292.9795014652. The cubic root of 18429673 is about 264.1430631464.

The spelling of 18429673 in words is "eighteen million, four hundred twenty-nine thousand, six hundred seventy-three".