21600312625 has 32 divisors (see below), whose sum is σ = 28566570240. Its totient is φ = 16250284800.

The previous prime is 21600312623. The next prime is 21600312631. The reversal of 21600312625 is 52621300612.

It is not a de Polignac number, because 21600312625 - 2¹ = 21600312623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21600312593 and 21600312602.

It is not an unprimeable number, because it can be changed into a prime (21600312623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3096892 + ... + 3103858.

It is an arithmetic number, because the mean of its divisors is an integer number (892705320).

Almost surely, 2^21600312625 is an apocalyptic number.

21600312625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21600312625 is a deficient number, since it is larger than the sum of its proper divisors (6966257615).

21600312625 is a wasteful number, since it uses less digits than its factorization.

21600312625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8458 (or 8448 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 21600312625 in words is "twenty-one billion, six hundred million, three hundred twelve thousand, six hundred twenty-five".