218290189652 has 12 divisors (see below), whose sum is σ = 382305586656. Its totient is φ = 109060022040.

The previous prime is 218290189643. The next prime is 218290189673. The reversal of 218290189652 is 256981092812.

It is a happy number.

It is a super-2 number, since 2×218290189652² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218290189594 and 218290189603.

It is a congruent number.

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, 21262424 + ... + 21272687.

It is an arithmetic number, because the mean of its divisors is an integer number (31858798888).

Almost surely, 2^218290189652 is an apocalyptic number.

It is an amenable number.

218290189652 is a deficient number, since it is larger than the sum of its proper divisors (164015397004).

218290189652 is a wasteful number, since it uses less digits than its factorization.

218290189652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42536398 (or 42536396 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 218290189652 in words is "two hundred eighteen billion, two hundred ninety million, one hundred eighty-nine thousand, six hundred fifty-two".