2169356823 has 10 divisors (see below), whose sum is σ = 3240644264. Its totient is φ = 1446237828.

The previous prime is 2169356821. The next prime is 2169356947. The reversal of 2169356823 is 3286539612.

2169356823 is a `hidden beast` number, since 2 + 1 + 69 + 3 + 568 + 23 = 666.

It is not a de Polignac number, because 2169356823 - 2¹ = 2169356821 is a prime.

It is a super-2 number, since 2×2169356823² = 9412218050993306658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169356821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13391011 + ... + 13391172.

Almost surely, 2^2169356823 is an apocalyptic number.

2169356823 is a deficient number, since it is larger than the sum of its proper divisors (1071287441).

2169356823 is an equidigital number, since it uses as much as digits as its factorization.

2169356823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26782195 (or 26782186 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 2169356823 is about 46576.3547629052. The cubic root of 2169356823 is about 1294.5246682527.

The spelling of 2169356823 in words is "two billion, one hundred sixty-nine million, three hundred fifty-six thousand, eight hundred twenty-three".