18293343161 has 2 divisors, whose sum is σ = 18293343162. Its totient is φ = 18293343160.

The previous prime is 18293343157. The next prime is 18293343169. The reversal of 18293343161 is 16134339281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18122544400 + 170798761 = 134620^2 + 13069^2 .

It is an emirp because it is prime and its reverse (16134339281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18293343161 - 2² = 18293343157 is a prime.

It is a super-2 number, since 2×18293343161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18293343169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9146671580 + 9146671581.

It is an arithmetic number, because the mean of its divisors is an integer number (9146671581).

Almost surely, 2^18293343161 is an apocalyptic number.

It is an amenable number.

18293343161 is a deficient number, since it is larger than the sum of its proper divisors (1).

18293343161 is an equidigital number, since it uses as much as digits as its factorization.

18293343161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The spelling of 18293343161 in words is "eighteen billion, two hundred ninety-three million, three hundred forty-three thousand, one hundred sixty-one".