29818285218 has 30 divisors (see below), whose sum is σ = 66819971691. Its totient is φ = 9938695788.

The previous prime is 29818285213. The next prime is 29818285309. The reversal of 29818285218 is 81258281892.

It is a happy number.

29818285218 is a `hidden beast` number, since 2 + 98 + 1 + 8 + 28 + 521 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14909142609 + 14909142609 = 122103^2 + 122103^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=122103.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (29818285213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2191071 + ... + 2204637.

Almost surely, 2^29818285218 is an apocalyptic number.

29818285218 is an abundant number, since it is smaller than the sum of its proper divisors (37001686473).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29818285218 is an frugal number, since it uses more digits than its factorization.

29818285218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27148 (or 13572 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 54.

It can be divided in two parts, 29818285 and 218, that added together give a triangular number (29818503 = T₇₇₂₂).

The spelling of 29818285218 in words is "twenty-nine billion, eight hundred eighteen million, two hundred eighty-five thousand, two hundred eighteen".