21907216025807 has 12 divisors (see below), whose sum is σ = 25484797125720. Its totient is φ = 18776955906576.

The previous prime is 21907216025753. The next prime is 21907216025819. The reversal of 21907216025807 is 70852061270912.

It is not a de Polignac number, because 21907216025807 - 2²⁴ = 21907199248591 is a prime.

It is a super-2 number, since 2×21907216025807² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21907216025207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6415757 + ... + 9218262.

It is an arithmetic number, because the mean of its divisors is an integer number (2123733093810).

Almost surely, 2^{21907216025807} is an apocalyptic number.

21907216025807 is a deficient number, since it is larger than the sum of its proper divisors (3577581099913).

21907216025807 is a wasteful number, since it uses less digits than its factorization.

21907216025807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662630 (or 15662623 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 21907216025807 in words is "twenty-one trillion, nine hundred seven billion, two hundred sixteen million, twenty-five thousand, eight hundred seven".