20682041639 has 4 divisors (see below), whose sum is σ = 23636619024. Its totient is φ = 17727464256.

The previous prime is 20682041617. The next prime is 20682041683. The reversal of 20682041639 is 93614028602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20682041639 - 2⁸ = 20682041383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20682041596 and 20682041605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20682041239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1477288682 + ... + 1477288695.

It is an arithmetic number, because the mean of its divisors is an integer number (5909154756).

Almost surely, 2^20682041639 is an apocalyptic number.

20682041639 is a deficient number, since it is larger than the sum of its proper divisors (2954577385).

20682041639 is an equidigital number, since it uses as much as digits as its factorization.

20682041639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954577384.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 20682041639 in words is "twenty billion, six hundred eighty-two million, forty-one thousand, six hundred thirty-nine".