2169806824 has 8 divisors (see below), whose sum is σ = 4068387810. Its totient is φ = 1084903408.

The previous prime is 2169806791. The next prime is 2169806827. The reversal of 2169806824 is 4286089612.

It can be written as a sum of positive squares in only one way, i.e., 2122444900 + 47361924 = 46070^2 + 6882^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135612919 + ... + 135612934.

Almost surely, 2^2169806824 is an apocalyptic number.

It is an amenable number.

2169806824 is a deficient number, since it is larger than the sum of its proper divisors (1898580986).

2169806824 is a wasteful number, since it uses less digits than its factorization.

2169806824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271225859 (or 271225855 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 2169806824 is about 46581.1853005052. The cubic root of 2169806824 is about 1294.6141720654.

The spelling of 2169806824 in words is "two billion, one hundred sixty-nine million, eight hundred six thousand, eight hundred twenty-four".