2169806823 has 12 divisors (see below), whose sum is σ = 3151483608. Its totient is φ = 1438544880.

The previous prime is 2169806791. The next prime is 2169806827. The reversal of 2169806823 is 3286089612.

It is not a de Polignac number, because 2169806823 - 2⁵ = 2169806791 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169806827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 664365 + ... + 667622.

It is an arithmetic number, because the mean of its divisors is an integer number (262623634).

Almost surely, 2^2169806823 is an apocalyptic number.

2169806823 is a deficient number, since it is larger than the sum of its proper divisors (981676785).

2169806823 is a wasteful number, since it uses less digits than its factorization.

2169806823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332174 (or 1332171 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 2169806823 is about 46581.1852897712. The cubic root of 2169806823 is about 1294.6141718665.

The spelling of 2169806823 in words is "two billion, one hundred sixty-nine million, eight hundred six thousand, eight hundred twenty-three".