218408029444 has 12 divisors (see below), whose sum is σ = 416960783568. Its totient is φ = 99276377000.

The previous prime is 218408029421. The next prime is 218408029481. The reversal of 218408029444 is 444920804812.

It is a super-2 number, since 2×218408029444² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218408029394 and 218408029403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2481909382 + ... + 2481909469.

It is an arithmetic number, because the mean of its divisors is an integer number (34746731964).

Almost surely, 2^218408029444 is an apocalyptic number.

It is an amenable number.

218408029444 is a deficient number, since it is larger than the sum of its proper divisors (198552754124).

218408029444 is a wasteful number, since it uses less digits than its factorization.

218408029444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963818866 (or 4963818864 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 46.

The spelling of 218408029444 in words is "two hundred eighteen billion, four hundred eight million, twenty-nine thousand, four hundred forty-four".