18983011 has 2 divisors, whose sum is σ = 18983012. Its totient is φ = 18983010.

The previous prime is 18983009. The next prime is 18983021. The reversal of 18983011 is 11038981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18983011 - 2¹ = 18983009 is a prime.

It is a super-2 number, since 2×18983011² = 720709413252242, which contains 22 as substring.

Together with 18983009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18983021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9491505 + 9491506.

It is an arithmetic number, because the mean of its divisors is an integer number (9491506).

Almost surely, 2^18983011 is an apocalyptic number.

18983011 is a deficient number, since it is larger than the sum of its proper divisors (1).

18983011 is an equidigital number, since it uses as much as digits as its factorization.

18983011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 18983011 is about 4356.9497357670. The cubic root of 18983011 is about 266.7606087422.

The spelling of 18983011 in words is "eighteen million, nine hundred eighty-three thousand, eleven".