29885700218 has 12 divisors (see below), whose sum is σ = 49274357370. Its totient is φ = 13584409080.

The previous prime is 29885700161. The next prime is 29885700241. The reversal of 29885700218 is 81200758892.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18704118169 + 11181582049 = 136763^2 + 105743^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61747073 + ... + 61747556.

Almost surely, 2^29885700218 is an apocalyptic number.

29885700218 is a deficient number, since it is larger than the sum of its proper divisors (19388657152).

29885700218 is a wasteful number, since it uses less digits than its factorization.

29885700218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123494653 (or 123494642 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 29885700218 in words is "twenty-nine billion, eight hundred eighty-five million, seven hundred thousand, two hundred eighteen".