21202312807 has 8 divisors (see below), whose sum is σ = 24176393136. Its totient is φ = 18420108672.

The previous prime is 21202312783. The next prime is 21202312811. The reversal of 21202312807 is 70821320212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202312807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202312837) 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, 47968813 + ... + 47969254.

It is an arithmetic number, because the mean of its divisors is an integer number (3022049142).

Almost surely, 2^21202312807 is an apocalyptic number.

21202312807 is a deficient number, since it is larger than the sum of its proper divisors (2974080329).

21202312807 is a wasteful number, since it uses less digits than its factorization.

21202312807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95938097.

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 21202312807 in words is "twenty-one billion, two hundred two million, three hundred twelve thousand, eight hundred seven".