2921939397868 has 6 divisors (see below), whose sum is σ = 5113393946276. Its totient is φ = 1460969698932.

The previous prime is 2921939397851. The next prime is 2921939397913. The reversal of 2921939397868 is 8687939391292.

It is a junction number, because it is equal to n+sod(n) for n = 2921939397794 and 2921939397803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365242424730 + ... + 365242424737.

Almost surely, 2^{2921939397868} is an apocalyptic number.

It is an amenable number.

2921939397868 is a deficient number, since it is larger than the sum of its proper divisors (2191454548408).

2921939397868 is a wasteful number, since it uses less digits than its factorization.

2921939397868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730484849471 (or 730484849469 counting only the distinct ones).

The product of its digits is 634894848, while the sum is 76.

The spelling of 2921939397868 in words is "two trillion, nine hundred twenty-one billion, nine hundred thirty-nine million, three hundred ninety-seven thousand, eight hundred sixty-eight".