218021582950 has 24 divisors (see below), whose sum is σ = 405556509240. Its totient is φ = 87200812800.

The previous prime is 218021582917. The next prime is 218021583001. The reversal of 218021582950 is 59285120812.

It is a junction number, because it is equal to n+sod(n) for n = 218021582897 and 218021582906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384685 + ... + 764215.

It is an arithmetic number, because the mean of its divisors is an integer number (16898187885).

Almost surely, 2^218021582950 is an apocalyptic number.

218021582950 is a deficient number, since it is larger than the sum of its proper divisors (187534926290).

218021582950 is a wasteful number, since it uses less digits than its factorization.

218021582950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391032 (or 391027 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 218021582950 in words is "two hundred eighteen billion, twenty-one million, five hundred eighty-two thousand, nine hundred fifty".