18040128829 has 2 divisors, whose sum is σ = 18040128830. Its totient is φ = 18040128828.

The previous prime is 18040128823. The next prime is 18040128857. The reversal of 18040128829 is 92882104081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17740908025 + 299220804 = 133195^2 + 17298^2 .

It is a cyclic number.

It is not a de Polignac number, because 18040128829 - 2¹¹ = 18040126781 is a prime.

It is a super-2 number, since 2×18040128829² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18040128823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020064414 + 9020064415.

It is an arithmetic number, because the mean of its divisors is an integer number (9020064415).

Almost surely, 2^18040128829 is an apocalyptic number.

It is an amenable number.

18040128829 is a deficient number, since it is larger than the sum of its proper divisors (1).

18040128829 is an equidigital number, since it uses as much as digits as its factorization.

18040128829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 43.

The spelling of 18040128829 in words is "eighteen billion, forty million, one hundred twenty-eight thousand, eight hundred twenty-nine".