20982205669 has 8 divisors (see below), whose sum is σ = 21381327000. Its totient is φ = 20583204096.

The previous prime is 20982205667. The next prime is 20982205691. The reversal of 20982205669 is 96650228902.

It can be written as a sum of positive squares in 4 ways, for example, as 807412225 + 20174793444 = 28415^2 + 142038^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20982205669 - 2¹ = 20982205667 is a prime.

It is a super-2 number, since 2×20982205669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20982205661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375457 + ... + 427705.

It is an arithmetic number, because the mean of its divisors is an integer number (2672665875).

Almost surely, 2^20982205669 is an apocalyptic number.

It is an amenable number.

20982205669 is a deficient number, since it is larger than the sum of its proper divisors (399121331).

20982205669 is an equidigital number, since it uses as much as digits as its factorization.

20982205669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59879.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 20982205669 in words is "twenty billion, nine hundred eighty-two million, two hundred five thousand, six hundred sixty-nine".