21932999159825 has 24 divisors (see below), whose sum is σ = 29289516085368. Its totient is φ = 16196385185280.

The previous prime is 21932999159801. The next prime is 21932999159837. The reversal of 21932999159825 is 52895199923912.

It is a Cunningham number, because it is equal to 4683268²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 20512049334529 + 1420949825296 = 4529023^2 + 1192036^2 .

It is not a de Polignac number, because 21932999159825 - 2⁸ = 21932999159569 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 18419957 + ... + 19574493.

It is an arithmetic number, because the mean of its divisors is an integer number (1220396503557).

Almost surely, 2^{21932999159825} is an apocalyptic number.

21932999159825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21932999159825 is a deficient number, since it is larger than the sum of its proper divisors (7356516925543).

21932999159825 is a wasteful number, since it uses less digits than its factorization.

21932999159825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213013 (or 1213008 counting only the distinct ones).

The product of its digits is 283435200, while the sum is 74.

The spelling of 21932999159825 in words is "twenty-one trillion, nine hundred thirty-two billion, nine hundred ninety-nine million, one hundred fifty-nine thousand, eight hundred twenty-five".