20832354171909 has 144 divisors (see below), whose sum is σ = 35502046968960. Its totient is φ = 11736306570240.

The previous prime is 20832354171857. The next prime is 20832354171913. The reversal of 20832354171909 is 90917145323802.

20832354171909 is a `hidden beast` number, since 2 + 0 + 8 + 3 + 2 + 3 + 541 + 7 + 1 + 90 + 9 = 666.

It is not a de Polignac number, because 20832354171909 - 2¹³ = 20832354163717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20832354171949) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6179871994 + ... + 6179875364.

It is an arithmetic number, because the mean of its divisors is an integer number (246541992840).

Almost surely, 2^{20832354171909} is an apocalyptic number.

It is an amenable number.

20832354171909 is a deficient number, since it is larger than the sum of its proper divisors (14669692797051).

20832354171909 is a wasteful number, since it uses less digits than its factorization.

20832354171909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200 (or 4190 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 20832354171909 in words is "twenty trillion, eight hundred thirty-two billion, three hundred fifty-four million, one hundred seventy-one thousand, nine hundred nine".