218281983450 has 24 divisors (see below), whose sum is σ = 541339319328. Its totient is φ = 58208528880.

The previous prime is 218281983449. The next prime is 218281983541. The reversal of 218281983450 is 54389182812.

It is a junction number, because it is equal to n+sod(n) for n = 218281983393 and 218281983402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 727606462 + ... + 727606761.

It is an arithmetic number, because the mean of its divisors is an integer number (22555804972).

Almost surely, 2^218281983450 is an apocalyptic number.

218281983450 is an abundant number, since it is smaller than the sum of its proper divisors (323057335878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218281983450 is a wasteful number, since it uses less digits than its factorization.

218281983450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455213238 (or 1455213233 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 218281983450 in words is "two hundred eighteen billion, two hundred eighty-one million, nine hundred eighty-three thousand, four hundred fifty".