181820000069 has 2 divisors, whose sum is σ = 181820000070. Its totient is φ = 181820000068.

The previous prime is 181820000003. The next prime is 181820000077. The reversal of 181820000069 is 960000028181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166168739044 + 15651261025 = 407638^2 + 125105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181820000069 is a prime.

It is a super-3 number, since 3×181820000069³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 181819999993 and 181820000038.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181820000099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90910000034 + 90910000035.

It is an arithmetic number, because the mean of its divisors is an integer number (90910000035).

Almost surely, 2^181820000069 is an apocalyptic number.

It is an amenable number.

181820000069 is a deficient number, since it is larger than the sum of its proper divisors (1).

181820000069 is an equidigital number, since it uses as much as digits as its factorization.

181820000069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 181820000069 in words is "one hundred eighty-one billion, eight hundred twenty million, sixty-nine", and thus it is an aban number.