18640883 has 2 divisors, whose sum is σ = 18640884. Its totient is φ = 18640882.

The previous prime is 18640877. The next prime is 18640903. The reversal of 18640883 is 38804681.

It is a weak prime.

It is an emirp because it is prime and its reverse (38804681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18640883 - 2¹⁴ = 18624499 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18640813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9320441 + 9320442.

It is an arithmetic number, because the mean of its divisors is an integer number (9320442).

Almost surely, 2^18640883 is an apocalyptic number.

18640883 is a deficient number, since it is larger than the sum of its proper divisors (1).

18640883 is an equidigital number, since it uses as much as digits as its factorization.

18640883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 18640883 is about 4317.5088882364. The cubic root of 18640883 is about 265.1482877194.

The spelling of 18640883 in words is "eighteen million, six hundred forty thousand, eight hundred eighty-three".