39842021803 has 4 divisors (see below), whose sum is σ = 39844090000. Its totient is φ = 39839953608.

The previous prime is 39842021773. The next prime is 39842021851. The reversal of 39842021803 is 30812024893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39842021803 - 2¹³ = 39842013611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39842021893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004928 + ... + 1043821.

It is an arithmetic number, because the mean of its divisors is an integer number (9961022500).

Almost surely, 2^39842021803 is an apocalyptic number.

39842021803 is a deficient number, since it is larger than the sum of its proper divisors (2068197).

39842021803 is a wasteful number, since it uses less digits than its factorization.

39842021803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068196.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 39842021803 in words is "thirty-nine billion, eight hundred forty-two million, twenty-one thousand, eight hundred three".