40021683842 has 32 divisors (see below), whose sum is σ = 70070880000. Its totient is φ = 17136935424.

The previous prime is 40021683841. The next prime is 40021683857. The reversal of 40021683842 is 24838612004.

It is a junction number, because it is equal to n+sod(n) for n = 40021683796 and 40021683805.

It is not an unprimeable number, because it can be changed into a prime (40021683841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765659 + ... + 816257.

It is an arithmetic number, because the mean of its divisors is an integer number (2189715000).

Almost surely, 2^40021683842 is an apocalyptic number.

40021683842 is a deficient number, since it is larger than the sum of its proper divisors (30049196158).

40021683842 is a wasteful number, since it uses less digits than its factorization.

40021683842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51775 (or 51761 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 40021683842 in words is "forty billion, twenty-one million, six hundred eighty-three thousand, eight hundred forty-two".