18835081 has 2 divisors, whose sum is σ = 18835082. Its totient is φ = 18835080.

The previous prime is 18835079. The next prime is 18835097. The reversal of 18835081 is 18053881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13995081 + 4840000 = 3741^2 + 2200^2 .

It is a cyclic number.

It is not a de Polignac number, because 18835081 - 2¹ = 18835079 is a prime.

It is a super-2 number, since 2×18835081² = 709520552553122, which contains 22 as substring.

Together with 18835079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18835051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9417540 + 9417541.

It is an arithmetic number, because the mean of its divisors is an integer number (9417541).

Almost surely, 2^18835081 is an apocalyptic number.

It is an amenable number.

18835081 is a deficient number, since it is larger than the sum of its proper divisors (1).

18835081 is an equidigital number, since it uses as much as digits as its factorization.

18835081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 18835081 is about 4339.9402069614. The cubic root of 18835081 is about 266.0658673827.

The spelling of 18835081 in words is "eighteen million, eight hundred thirty-five thousand, eighty-one".