18149983 has 2 divisors, whose sum is σ = 18149984. Its totient is φ = 18149982.

The previous prime is 18149981. The next prime is 18150019. The reversal of 18149983 is 38994181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18149983 - 2¹ = 18149981 is a prime.

Together with 18149981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18149981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9074991 + 9074992.

It is an arithmetic number, because the mean of its divisors is an integer number (9074992).

Almost surely, 2^18149983 is an apocalyptic number.

18149983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18149983 is an equidigital number, since it uses as much as digits as its factorization.

18149983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 18149983 is about 4260.2796856545. The cubic root of 18149983 is about 262.8000282251.

The spelling of 18149983 in words is "eighteen million, one hundred forty-nine thousand, nine hundred eighty-three".