820243130027 has 4 divisors (see below), whose sum is σ = 848527375920. Its totient is φ = 791958884136.

The previous prime is 820243130023. The next prime is 820243130033. The reversal of 820243130027 is 720031342028.

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 820243130027 - 2² = 820243130023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 820243129975 and 820243130002.

It is not an unprimeable number, because it can be changed into a prime (820243130023) 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, 14142122903 + ... + 14142122960.

It is an arithmetic number, because the mean of its divisors is an integer number (212131843980).

Almost surely, 2^820243130027 is an apocalyptic number.

820243130027 is a deficient number, since it is larger than the sum of its proper divisors (28284245893).

820243130027 is a wasteful number, since it uses less digits than its factorization.

820243130027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28284245892.

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 820243130027 in words is "eight hundred twenty billion, two hundred forty-three million, one hundred thirty thousand, twenty-seven".