21088805107 has 8 divisors (see below), whose sum is σ = 21582489600. Its totient is φ = 20596995144.

The previous prime is 21088805081. The next prime is 21088805119. The reversal of 21088805107 is 70150888012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21088805107 - 2²³ = 21080416499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21088805107.

It is not an unprimeable number, because it can be changed into a prime (21088805207) 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, 445857 + ... + 490882.

It is an arithmetic number, because the mean of its divisors is an integer number (2697811200).

Almost surely, 2^21088805107 is an apocalyptic number.

21088805107 is a deficient number, since it is larger than the sum of its proper divisors (493684493).

21088805107 is an equidigital number, since it uses as much as digits as its factorization.

21088805107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937265.

The product of its (nonzero) digits is 35840, while the sum is 40.

The spelling of 21088805107 in words is "twenty-one billion, eighty-eight million, eight hundred five thousand, one hundred seven".