2002805923 has 4 divisors (see below), whose sum is σ = 2040594768. Its totient is φ = 1965017080.

The previous prime is 2002805897. The next prime is 2002805927. The reversal of 2002805923 is 3295082002.

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 2002805923 - 2²⁹ = 1465935011 is a prime.

It is a super-2 number, since 2×2002805923² = 8022463130407763858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002805927) 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, 18894343 + ... + 18894448.

It is an arithmetic number, because the mean of its divisors is an integer number (510148692).

Almost surely, 2^2002805923 is an apocalyptic number.

2002805923 is a deficient number, since it is larger than the sum of its proper divisors (37788845).

2002805923 is an equidigital number, since it uses as much as digits as its factorization.

2002805923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37788844.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2002805923 is about 44752.7197274087. The cubic root of 2002805923 is about 1260.5099814732.

Adding to 2002805923 its reverse (3295082002), we get a palindrome (5297887925).

The spelling of 2002805923 in words is "two billion, two million, eight hundred five thousand, nine hundred twenty-three".