18693243 has 6 divisors (see below), whose sum is σ = 27001364. Its totient is φ = 12462156.

The previous prime is 18693209. The next prime is 18693247. The reversal of 18693243 is 34239681.

It is not a de Polignac number, because 18693243 - 2⁶ = 18693179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18693198 and 18693207.

It is not an unprimeable number, because it can be changed into a prime (18693247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1038505 + ... + 1038522.

Almost surely, 2^18693243 is an apocalyptic number.

18693243 is a deficient number, since it is larger than the sum of its proper divisors (8308121).

18693243 is a wasteful number, since it uses less digits than its factorization.

18693243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077033 (or 2077030 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 18693243 is about 4323.5683179522. The cubic root of 18693243 is about 265.3963121983.

The spelling of 18693243 in words is "eighteen million, six hundred ninety-three thousand, two hundred forty-three".