21682662573 has 96 divisors (see below), whose sum is σ = 36477826560. Its totient is φ = 11263000320.

The previous prime is 21682662571. The next prime is 21682662583. The reversal of 21682662573 is 37526628612.

It is not a de Polignac number, because 21682662573 - 2¹ = 21682662571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21682662571) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22895686 + ... + 22896632.

It is an arithmetic number, because the mean of its divisors is an integer number (379977360).

Almost surely, 2^21682662573 is an apocalyptic number.

It is an amenable number.

21682662573 is a deficient number, since it is larger than the sum of its proper divisors (14795163987).

21682662573 is a wasteful number, since it uses less digits than its factorization.

21682662573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1046 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The spelling of 21682662573 in words is "twenty-one billion, six hundred eighty-two million, six hundred sixty-two thousand, five hundred seventy-three".