21706751562275 has 12 divisors (see below), whose sum is σ = 28986862086672. Its totient is φ = 16029601153440.

The previous prime is 21706751562263. The next prime is 21706751562289. The reversal of 21706751562275 is 57226515760712.

It is not a de Polignac number, because 21706751562275 - 2⁸ = 21706751562019 is a prime.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

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 21706751562275.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33395002079 + ... + 33395002728.

It is an arithmetic number, because the mean of its divisors is an integer number (2415571840556).

Almost surely, 2^{21706751562275} is an apocalyptic number.

21706751562275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21706751562275 is a deficient number, since it is larger than the sum of its proper divisors (7280110524397).

21706751562275 is a wasteful number, since it uses less digits than its factorization.

21706751562275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66790004830 (or 66790004825 counting only the distinct ones).

The product of its (nonzero) digits is 12348000, while the sum is 56.

The spelling of 21706751562275 in words is "twenty-one trillion, seven hundred six billion, seven hundred fifty-one million, five hundred sixty-two thousand, two hundred seventy-five".