21832117856040 has 128 divisors (see below), whose sum is σ = 68345708048640. Its totient is φ = 5568634638336.

The previous prime is 21832117856039. The next prime is 21832117856069. The reversal of 21832117856040 is 4065871123812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158280544 + ... + 158418416.

It is an arithmetic number, because the mean of its divisors is an integer number (533950844130).

Almost surely, 2^{21832117856040} is an apocalyptic number.

21832117856040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21832117856040 is an abundant number, since it is smaller than the sum of its proper divisors (46513590192600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21832117856040 is a wasteful number, since it uses less digits than its factorization.

21832117856040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195283 (or 195279 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

Adding to 21832117856040 its reverse (4065871123812), we get a palindrome (25897988979852).

The spelling of 21832117856040 in words is "twenty-one trillion, eight hundred thirty-two billion, one hundred seventeen million, eight hundred fifty-six thousand, forty".