2000123805 has 16 divisors (see below), whose sum is σ = 3260580480. Its totient is φ = 1046605248.

The previous prime is 2000123767. The next prime is 2000123809. The reversal of 2000123805 is 5083210002.

It is not a de Polignac number, because 2000123805 - 2⁸ = 2000123549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000123809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257145 + ... + 1258734.

It is an arithmetic number, because the mean of its divisors is an integer number (203786280).

Almost surely, 2^2000123805 is an apocalyptic number.

It is an amenable number.

2000123805 is a deficient number, since it is larger than the sum of its proper divisors (1260456675).

2000123805 is a wasteful number, since it uses less digits than its factorization.

2000123805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515940.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2000123805 is about 44722.7437105551. The cubic root of 2000123805 is about 1259.9470467794.

Adding to 2000123805 its reverse (5083210002), we get a palindrome (7083333807).

The spelling of 2000123805 in words is "two billion, one hundred twenty-three thousand, eight hundred five".