21704700267 has 6 divisors (see below), whose sum is σ = 31351233732. Its totient is φ = 14469800172.

The previous prime is 21704700257. The next prime is 21704700271. The reversal of 21704700267 is 76200740712.

It is a happy number.

It is not a de Polignac number, because 21704700267 - 2¹⁰ = 21704699243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21704700247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1205816673 + ... + 1205816690.

It is an arithmetic number, because the mean of its divisors is an integer number (5225205622).

Almost surely, 2^21704700267 is an apocalyptic number.

21704700267 is a deficient number, since it is larger than the sum of its proper divisors (9646533465).

21704700267 is a wasteful number, since it uses less digits than its factorization.

21704700267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411633369 (or 2411633366 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The spelling of 21704700267 in words is "twenty-one billion, seven hundred four million, seven hundred thousand, two hundred sixty-seven".