21682332513 has 12 divisors (see below), whose sum is σ = 32047272400. Its totient is φ = 14118727896.

The previous prime is 21682332437. The next prime is 21682332517. The reversal of 21682332513 is 31523328612.

It is not a de Polignac number, because 21682332513 - 2¹⁸ = 21682070369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21682332517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28012963 + ... + 28013736.

Almost surely, 2^21682332513 is an apocalyptic number.

It is an amenable number.

21682332513 is a deficient number, since it is larger than the sum of its proper divisors (10364939887).

21682332513 is a wasteful number, since it uses less digits than its factorization.

21682332513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56026748 (or 56026745 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 21682332513 in words is "twenty-one billion, six hundred eighty-two million, three hundred thirty-two thousand, five hundred thirteen".