18333871841 has 2 divisors, whose sum is σ = 18333871842. Its totient is φ = 18333871840.

The previous prime is 18333871823. The next prime is 18333871877. The reversal of 18333871841 is 14817833381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17264908816 + 1068963025 = 131396^2 + 32695^2 .

It is a cyclic number.

It is not a de Polignac number, because 18333871841 - 2¹⁰ = 18333870817 is a prime.

It is a super-2 number, since 2×18333871841² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18333871441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9166935920 + 9166935921.

It is an arithmetic number, because the mean of its divisors is an integer number (9166935921).

Almost surely, 2^18333871841 is an apocalyptic number.

It is an amenable number.

18333871841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18333871841 is an equidigital number, since it uses as much as digits as its factorization.

18333871841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The spelling of 18333871841 in words is "eighteen billion, three hundred thirty-three million, eight hundred seventy-one thousand, eight hundred forty-one".