821338018148 has 12 divisors (see below), whose sum is σ = 1451296304640. Its totient is φ = 406681931112.

The previous prime is 821338018133. The next prime is 821338018187. The reversal of 821338018148 is 841810833128.

It is a super-2 number, since 2×821338018148² (a number of 25 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 996769028 + ... + 996769851.

It is an arithmetic number, because the mean of its divisors is an integer number (120941358720).

Almost surely, 2^821338018148 is an apocalyptic number.

It is an amenable number.

821338018148 is a deficient number, since it is larger than the sum of its proper divisors (629958286492).

821338018148 is a wasteful number, since it uses less digits than its factorization.

821338018148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993538986 (or 1993538984 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 47.

The spelling of 821338018148 in words is "eight hundred twenty-one billion, three hundred thirty-eight million, eighteen thousand, one hundred forty-eight".