18345723 has 8 divisors (see below), whose sum is σ = 26684736. Its totient is φ = 11118600.

The previous prime is 18345709. The next prime is 18345727. The reversal of 18345723 is 32754381.

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

It is not a de Polignac number, because 18345723 - 2¹⁰ = 18344699 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 555931 = 18345723 / (1 + 8 + 3 + 4 + 5 + 7 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (18345727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277933 + ... + 277998.

It is an arithmetic number, because the mean of its divisors is an integer number (3335592).

Almost surely, 2^18345723 is an apocalyptic number.

18345723 is a deficient number, since it is larger than the sum of its proper divisors (8339013).

18345723 is a wasteful number, since it uses less digits than its factorization.

18345723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555945.

The product of its digits is 20160, while the sum is 33.

The square root of 18345723 is about 4283.1907498966. The cubic root of 18345723 is about 263.7413818377.

It can be divided in two parts, 1834572 and 3, that multiplied together give a square (5503716 = 2346²).

The spelling of 18345723 in words is "eighteen million, three hundred forty-five thousand, seven hundred twenty-three".