18384983 has 2 divisors, whose sum is σ = 18384984. Its totient is φ = 18384982.

The previous prime is 18384979. The next prime is 18384991. The reversal of 18384983 is 38948381.

It is a weak prime.

It is an emirp because it is prime and its reverse (38948381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18384983 - 2² = 18384979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18387983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9192491 + 9192492.

It is an arithmetic number, because the mean of its divisors is an integer number (9192492).

Almost surely, 2^18384983 is an apocalyptic number.

18384983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18384983 is an equidigital number, since it uses as much as digits as its factorization.

18384983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 18384983 is about 4287.7713325223. The cubic root of 18384983 is about 263.9293840438.

The spelling of 18384983 in words is "eighteen million, three hundred eighty-four thousand, nine hundred eighty-three".