243940021804 has 24 divisors (see below), whose sum is σ = 449578805760. Its totient is φ = 115495094736.

The previous prime is 243940021777. The next prime is 243940021817. The reversal of 243940021804 is 408120049342.

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, 610372 + ... + 927595.

It is an arithmetic number, because the mean of its divisors is an integer number (18732450240).

Almost surely, 2^243940021804 is an apocalyptic number.

It is an amenable number.

243940021804 is a deficient number, since it is larger than the sum of its proper divisors (205638783956).

243940021804 is a wasteful number, since it uses less digits than its factorization.

243940021804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540077 (or 1540075 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 243940021804 in words is "two hundred forty-three billion, nine hundred forty million, twenty-one thousand, eight hundred four".