21704054635 has 12 divisors (see below), whose sum is σ = 27487796688. Its totient is φ = 16449387408.

The previous prime is 21704054629. The next prime is 21704054639. The reversal of 21704054635 is 53645040712.

It is a de Polignac number, because none of the positive numbers 2^k-21704054635 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21704054594 and 21704054603.

It is not an unprimeable number, because it can be changed into a prime (21704054639) 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 11 ways as a sum of consecutive naturals, for example, 6010399 + ... + 6014008.

It is an arithmetic number, because the mean of its divisors is an integer number (2290649724).

Almost surely, 2^21704054635 is an apocalyptic number.

21704054635 is a deficient number, since it is larger than the sum of its proper divisors (5783742053).

21704054635 is a wasteful number, since it uses less digits than its factorization.

21704054635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12024450 (or 12024431 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 21704054635 in words is "twenty-one billion, seven hundred four million, fifty-four thousand, six hundred thirty-five".