218408029443 has 12 divisors (see below), whose sum is σ = 317413716360. Its totient is φ = 144712067616.

The previous prime is 218408029421. The next prime is 218408029481. The reversal of 218408029443 is 344920804812.

218408029443 is a `hidden beast` number, since 2 + 184 + 0 + 8 + 0 + 29 + 443 = 666.

It is not a de Polignac number, because 218408029443 - 2¹² = 218408025347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218408029843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74438898 + ... + 74441831.

It is an arithmetic number, because the mean of its divisors is an integer number (26451143030).

Almost surely, 2^218408029443 is an apocalyptic number.

218408029443 is a deficient number, since it is larger than the sum of its proper divisors (99005686917).

218408029443 is a wasteful number, since it uses less digits than its factorization.

218408029443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148880898 (or 148880895 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 218408029443 in words is "two hundred eighteen billion, four hundred eight million, twenty-nine thousand, four hundred forty-three".