21485683712 has 44 divisors (see below), whose sum is σ = 42974816256. Its totient is φ = 10736732160.

The previous prime is 21485683663. The next prime is 21485683771. The reversal of 21485683712 is 21738658412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2189537 + ... + 2199327.

Almost surely, 2^21485683712 is an apocalyptic number.

It is an amenable number.

21485683712 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

21485683712 is an equidigital number, since it uses as much as digits as its factorization.

21485683712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11954 (or 11936 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The spelling of 21485683712 in words is "twenty-one billion, four hundred eighty-five million, six hundred eighty-three thousand, seven hundred twelve".