18423677 has 4 divisors (see below), whose sum is σ = 18439260. Its totient is φ = 18408096.

The previous prime is 18423659. The next prime is 18423679. The reversal of 18423677 is 77632481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77632481 = 5333 ⋅14557.

It can be written as a sum of positive squares in 2 ways, for example, as 5707321 + 12716356 = 2389^2 + 3566^2 .

It is a cyclic number.

It is not a de Polignac number, because 18423677 - 2⁸ = 18423421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18423677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18423679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5858 + ... + 8435.

It is an arithmetic number, because the mean of its divisors is an integer number (4609815).

Almost surely, 2^18423677 is an apocalyptic number.

It is an amenable number.

18423677 is a deficient number, since it is larger than the sum of its proper divisors (15583).

18423677 is a wasteful number, since it uses less digits than its factorization.

18423677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15582.

The product of its digits is 56448, while the sum is 38.

The square root of 18423677 is about 4292.2810951754. The cubic root of 18423677 is about 264.1144141737.

The spelling of 18423677 in words is "eighteen million, four hundred twenty-three thousand, six hundred seventy-seven".