18672043 has 4 divisors (see below), whose sum is σ = 20108368. Its totient is φ = 17235720.

The previous prime is 18671993. The next prime is 18672053. The reversal of 18672043 is 34027681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34027681 = 479 ⋅71039.

It is a cyclic number.

It is not a de Polignac number, because 18672043 - 2¹³ = 18663851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18671996 and 18672014.

It is not an unprimeable number, because it can be changed into a prime (18672053) 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, 718143 + ... + 718168.

It is an arithmetic number, because the mean of its divisors is an integer number (5027092).

Almost surely, 2^18672043 is an apocalyptic number.

18672043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18672043 is a deficient number, since it is larger than the sum of its proper divisors (1436325).

18672043 is a wasteful number, since it uses less digits than its factorization.

18672043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436324.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 18672043 is about 4321.1159438275. The cubic root of 18672043 is about 265.2959456269.

The spelling of 18672043 in words is "eighteen million, six hundred seventy-two thousand, forty-three".