18813723 has 8 divisors (see below), whose sum is σ = 25763088. Its totient is φ = 12203424.

The previous prime is 18813689. The next prime is 18813731. The reversal of 18813723 is 32731881.

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

It is not a de Polignac number, because 18813723 - 2¹⁰ = 18812699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18813763) 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 7 ways as a sum of consecutive naturals, for example, 84636 + ... + 84857.

It is an arithmetic number, because the mean of its divisors is an integer number (3220386).

Almost surely, 2^18813723 is an apocalyptic number.

18813723 is a deficient number, since it is larger than the sum of its proper divisors (6949365).

18813723 is a wasteful number, since it uses less digits than its factorization.

18813723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169533.

The product of its digits is 8064, while the sum is 33.

The square root of 18813723 is about 4337.4788760293. The cubic root of 18813723 is about 265.9652610710.

The spelling of 18813723 in words is "eighteen million, eight hundred thirteen thousand, seven hundred twenty-three".