820363203843 has 8 divisors (see below), whose sum is σ = 1093848268800. Its totient is φ = 546893470728.

The previous prime is 820363203839. The next prime is 820363203857. The reversal of 820363203843 is 348302363028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820363203843 - 2² = 820363203839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 820363203795 and 820363203804.

It is not an unprimeable number, because it can be changed into a prime (820363203943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3707523 + ... + 3922556.

It is an arithmetic number, because the mean of its divisors is an integer number (136731033600).

Almost surely, 2^820363203843 is an apocalyptic number.

820363203843 is a deficient number, since it is larger than the sum of its proper divisors (273485064957).

820363203843 is a wasteful number, since it uses less digits than its factorization.

820363203843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7665921.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 820363203843 in words is "eight hundred twenty billion, three hundred sixty-three million, two hundred three thousand, eight hundred forty-three".