8180218829 has 2 divisors, whose sum is σ = 8180218830. Its totient is φ = 8180218828.

The previous prime is 8180218817. The next prime is 8180218859. The reversal of 8180218829 is 9288120818.

8180218829 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6695657929 + 1484560900 = 81827^2 + 38530^2 .

It is a cyclic number.

It is not a de Polignac number, because 8180218829 - 2⁸ = 8180218573 is a prime.

It is a super-2 number, since 2×8180218829² (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 (8180218859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4090109414 + 4090109415.

It is an arithmetic number, because the mean of its divisors is an integer number (4090109415).

Almost surely, 2^8180218829 is an apocalyptic number.

It is an amenable number.

8180218829 is a deficient number, since it is larger than the sum of its proper divisors (1).

8180218829 is an equidigital number, since it uses as much as digits as its factorization.

8180218829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 47.

The square root of 8180218829 is about 90444.5621859048. The cubic root of 8180218829 is about 2014.9068525801.

The spelling of 8180218829 in words is "eight billion, one hundred eighty million, two hundred eighteen thousand, eight hundred twenty-nine".