21682343136 has 24 divisors (see below), whose sum is σ = 56916150984. Its totient is φ = 7227447680.

The previous prime is 21682343083. The next prime is 21682343153. The reversal of 21682343136 is 63134328612.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21682343094 and 21682343103.

It is a congruent number.

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, 112928775 + ... + 112928966.

It is an arithmetic number, because the mean of its divisors is an integer number (2371506291).

Almost surely, 2^21682343136 is an apocalyptic number.

It is an amenable number.

21682343136 is an abundant number, since it is smaller than the sum of its proper divisors (35233807848).

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

21682343136 is a wasteful number, since it uses less digits than its factorization.

21682343136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225857754 (or 225857746 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The spelling of 21682343136 in words is "twenty-one billion, six hundred eighty-two million, three hundred forty-three thousand, one hundred thirty-six".