21270604717 has 16 divisors (see below), whose sum is σ = 21946159872. Its totient is φ = 20603047680.

The previous prime is 21270604711. The next prime is 21270604721. The reversal of 21270604717 is 71740607212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21270604717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21270604711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3502918 + ... + 3508984.

It is an arithmetic number, because the mean of its divisors is an integer number (1371634992).

Almost surely, 2^21270604717 is an apocalyptic number.

It is an amenable number.

21270604717 is a deficient number, since it is larger than the sum of its proper divisors (675555155).

21270604717 is a wasteful number, since it uses less digits than its factorization.

21270604717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6708.

The product of its (nonzero) digits is 32928, while the sum is 37.

The spelling of 21270604717 in words is "twenty-one billion, two hundred seventy million, six hundred four thousand, seven hundred seventeen".