18061723 has 4 divisors (see below), whose sum is σ = 19012360. Its totient is φ = 17111088.

The previous prime is 18061721. The next prime is 18061741. The reversal of 18061723 is 32716081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32716081 = 19 ⋅1721899.

It is a cyclic number.

It is not a de Polignac number, because 18061723 - 2¹ = 18061721 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18061691 and 18061700.

It is not an unprimeable number, because it can be changed into a prime (18061721) 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 3 ways as a sum of consecutive naturals, for example, 475290 + ... + 475327.

It is an arithmetic number, because the mean of its divisors is an integer number (4753090).

Almost surely, 2^18061723 is an apocalyptic number.

18061723 is a deficient number, since it is larger than the sum of its proper divisors (950637).

18061723 is an equidigital number, since it uses as much as digits as its factorization.

18061723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950636.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 18061723 is about 4249.9085872522. The cubic root of 18061723 is about 262.3733532687.

The spelling of 18061723 in words is "eighteen million, sixty-one thousand, seven hundred twenty-three".