18350183381 has 2 divisors, whose sum is σ = 18350183382. Its totient is φ = 18350183380.

The previous prime is 18350183329. The next prime is 18350183407. The reversal of 18350183381 is 18338105381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18303384100 + 46799281 = 135290^2 + 6841^2 .

It is a cyclic number.

It is not a de Polignac number, because 18350183381 - 2⁶ = 18350183317 is a prime.

It is a super-2 number, since 2×18350183381² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18350183321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175091690 + 9175091691.

It is an arithmetic number, because the mean of its divisors is an integer number (9175091691).

Almost surely, 2^18350183381 is an apocalyptic number.

It is an amenable number.

18350183381 is a deficient number, since it is larger than the sum of its proper divisors (1).

18350183381 is an equidigital number, since it uses as much as digits as its factorization.

18350183381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 18350183381 in words is "eighteen billion, three hundred fifty million, one hundred eighty-three thousand, three hundred eighty-one".