2820646823 has 4 divisors (see below), whose sum is σ = 2827543680. Its totient is φ = 2813749968.

The previous prime is 2820646813. The next prime is 2820646847. The reversal of 2820646823 is 3286460282.

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 2820646823 - 2²² = 2816452519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820646813) 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, 3447815 + ... + 3448632.

It is an arithmetic number, because the mean of its divisors is an integer number (706885920).

Almost surely, 2^2820646823 is an apocalyptic number.

2820646823 is a deficient number, since it is larger than the sum of its proper divisors (6896857).

2820646823 is an equidigital number, since it uses as much as digits as its factorization.

2820646823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6896856.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 2820646823 is about 53109.7620310993. The cubic root of 2820646823 is about 1412.9156546128.

The spelling of 2820646823 in words is "two billion, eight hundred twenty million, six hundred forty-six thousand, eight hundred twenty-three".