18940283 has 4 divisors (see below), whose sum is σ = 19937160. Its totient is φ = 17943408.

The previous prime is 18940267. The next prime is 18940307. The reversal of 18940283 is 38204981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38204981 = 4051 ⋅9431.

It is a cyclic number.

It is not a de Polignac number, because 18940283 - 2⁴ = 18940267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18940183) 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, 498410 + ... + 498447.

It is an arithmetic number, because the mean of its divisors is an integer number (4984290).

Almost surely, 2^18940283 is an apocalyptic number.

18940283 is a deficient number, since it is larger than the sum of its proper divisors (996877).

18940283 is an equidigital number, since it uses as much as digits as its factorization.

18940283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996876.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18940283 is about 4352.0435429807. The cubic root of 18940283 is about 266.5603119284.

The spelling of 18940283 in words is "eighteen million, nine hundred forty thousand, two hundred eighty-three".