21682260936 has 96 divisors (see below), whose sum is σ = 67407762240. Its totient is φ = 6167608704.

The previous prime is 21682260917. The next prime is 21682260979. The reversal of 21682260936 is 63906228612.

21682260936 is a `hidden beast` number, since 2 + 1 + 6 + 8 + 2 + 2 + 609 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21682260891 and 21682260900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19650 + ... + 209166.

It is an arithmetic number, because the mean of its divisors is an integer number (702164190).

Almost surely, 2^21682260936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21682260936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33703881120).

21682260936 is an abundant number, since it is smaller than the sum of its proper divisors (45725501304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21682260936 is a wasteful number, since it uses less digits than its factorization.

21682260936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189763 (or 189756 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 21682260936 in words is "twenty-one billion, six hundred eighty-two million, two hundred sixty thousand, nine hundred thirty-six".