21825693807875 has 8 divisors (see below), whose sum is σ = 27238465872384. Its totient is φ = 17460555046200.

The previous prime is 21825693807871. The next prime is 21825693807941. The reversal of 21825693807875 is 57870839652812.

It is not a de Polignac number, because 21825693807875 - 2² = 21825693807871 is a prime.

It is a super-2 number, since 2×21825693807875² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21825693807799 and 21825693807808.

It is not an unprimeable number, because it can be changed into a prime (21825693807871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87302775107 + ... + 87302775356.

It is an arithmetic number, because the mean of its divisors is an integer number (3404808234048).

Almost surely, 2^{21825693807875} is an apocalyptic number.

21825693807875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21825693807875 is a deficient number, since it is larger than the sum of its proper divisors (5412772064509).

21825693807875 is an equidigital number, since it uses as much as digits as its factorization.

21825693807875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174605550478 (or 174605550468 counting only the distinct ones).

The product of its (nonzero) digits is 406425600, while the sum is 71.

The spelling of 21825693807875 in words is "twenty-one trillion, eight hundred twenty-five billion, six hundred ninety-three million, eight hundred seven thousand, eight hundred seventy-five".