18729093 has 8 divisors (see below), whose sum is σ = 24995808. Its totient is φ = 12474224.

The previous prime is 18729091. The next prime is 18729097. The reversal of 18729093 is 39092781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18729093 - 2¹ = 18729091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18729091) 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 7 ways as a sum of consecutive naturals, for example, 1846 + ... + 6392.

It is an arithmetic number, because the mean of its divisors is an integer number (3124476).

Almost surely, 2^18729093 is an apocalyptic number.

It is an amenable number.

18729093 is a deficient number, since it is larger than the sum of its proper divisors (6266715).

18729093 is a wasteful number, since it uses less digits than its factorization.

18729093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 18729093 is about 4327.7122131676. The cubic root of 18729093 is about 265.5658633381.

The spelling of 18729093 in words is "eighteen million, seven hundred twenty-nine thousand, ninety-three".