18730005 has 48 divisors (see below), whose sum is σ = 36936000. Its totient is φ = 8053248.

The previous prime is 18730001. The next prime is 18730009. The reversal of 18730005 is 50003781.

It is an interprime number because it is at equal distance from previous prime (18730001) and next prime (18730009).

It is not a de Polignac number, because 18730005 - 2² = 18730001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11746 + ... + 13244.

It is an arithmetic number, because the mean of its divisors is an integer number (769500).

Almost surely, 2^18730005 is an apocalyptic number.

18730005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18730005 is the 2499-th octagonal number.

It is an amenable number.

18730005 is a deficient number, since it is larger than the sum of its proper divisors (18205995).

18730005 is a wasteful number, since it uses less digits than its factorization.

18730005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538 (or 1531 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 18730005 is about 4327.8175793349. The cubic root of 18730005 is about 265.5701737824.

Adding to 18730005 its reverse (50003781), we get a palindrome (68733786).

The spelling of 18730005 in words is "eighteen million, seven hundred thirty thousand, five".