21683613670 has 16 divisors (see below), whose sum is σ = 39032370720. Its totient is φ = 8673030784.

The previous prime is 21683613661. The next prime is 21683613671. The reversal of 21683613670 is 7631638612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21683613671) 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 7 ways as a sum of consecutive naturals, for example, 253326 + ... + 327934.

It is an arithmetic number, because the mean of its divisors is an integer number (2439523170).

Almost surely, 2^21683613670 is an apocalyptic number.

21683613670 is a deficient number, since it is larger than the sum of its proper divisors (17348757050).

21683613670 is a wasteful number, since it uses less digits than its factorization.

21683613670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103679.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 21683613670 in words is "twenty-one billion, six hundred eighty-three million, six hundred thirteen thousand, six hundred seventy".