218124424421812 has 24 divisors (see below), whose sum is σ = 383023852998696. Its totient is φ = 108689044303488.

The previous prime is 218124424421809. The next prime is 218124424421857.

218124424421812 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 169632755170596 + 48491669251216 = 13024314^2 + 6963596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145865098 + ... + 147352894.

It is an arithmetic number, because the mean of its divisors is an integer number (15959327208279).

Almost surely, 2^{218124424421812} is an apocalyptic number.

It is an amenable number.

218124424421812 is a deficient number, since it is larger than the sum of its proper divisors (164899428576884).

218124424421812 is a wasteful number, since it uses less digits than its factorization.

218124424421812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613187 (or 1613185 counting only the distinct ones).

The product of its digits is 524288, while the sum is 46.

The spelling of 218124424421812 in words is "two hundred eighteen trillion, one hundred twenty-four billion, four hundred twenty-four million, four hundred twenty-one thousand, eight hundred twelve".