18920043 has 12 divisors (see below), whose sum is σ = 27965080. Its totient is φ = 12319776.

The previous prime is 18920003. The next prime is 18920047. The reversal of 18920043 is 34002981.

It is not a de Polignac number, because 18920043 - 2¹⁷ = 18788971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18919989 and 18920016.

It is not an unprimeable number, because it can be changed into a prime (18920047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24058 + ... + 24831.

Almost surely, 2^18920043 is an apocalyptic number.

18920043 is a deficient number, since it is larger than the sum of its proper divisors (9045037).

18920043 is a wasteful number, since it uses less digits than its factorization.

18920043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48938 (or 48935 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18920043 is about 4349.7175770388. The cubic root of 18920043 is about 266.4653273629.

The spelling of 18920043 in words is "eighteen million, nine hundred twenty thousand, forty-three".