21726675704217 has 32 divisors (see below), whose sum is σ = 31883152135680. Its totient is φ = 13050725425920.

The previous prime is 21726675704213. The next prime is 21726675704243. The reversal of 21726675704217 is 71240757662712.

It is not a de Polignac number, because 21726675704217 - 2² = 21726675704213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21726675704213) 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, 141576834 + ... + 141730212.

It is an arithmetic number, because the mean of its divisors is an integer number (996348504240).

Almost surely, 2^{21726675704217} is an apocalyptic number.

It is an amenable number.

21726675704217 is a deficient number, since it is larger than the sum of its proper divisors (10156476431463).

21726675704217 is a wasteful number, since it uses less digits than its factorization.

21726675704217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191493.

The product of its (nonzero) digits is 13829760, while the sum is 57.

The spelling of 21726675704217 in words is "twenty-one trillion, seven hundred twenty-six billion, six hundred seventy-five million, seven hundred four thousand, two hundred seventeen".