18979283 has 2 divisors, whose sum is σ = 18979284. Its totient is φ = 18979282.

The previous prime is 18979277. The next prime is 18979313. The reversal of 18979283 is 38297981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18979283 - 2⁴ = 18979267 is a prime.

It is not a weakly prime, because it can be changed into another prime (18979783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9489641 + 9489642.

It is an arithmetic number, because the mean of its divisors is an integer number (9489642).

Almost surely, 2^18979283 is an apocalyptic number.

18979283 is a deficient number, since it is larger than the sum of its proper divisors (1).

18979283 is an equidigital number, since it uses as much as digits as its factorization.

18979283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 18979283 is about 4356.5218925193. The cubic root of 18979283 is about 266.7431449047.

The spelling of 18979283 in words is "eighteen million, nine hundred seventy-nine thousand, two hundred eighty-three".