20658269069 has 2 divisors, whose sum is σ = 20658269070. Its totient is φ = 20658269068.

The previous prime is 20658269063. The next prime is 20658269081. The reversal of 20658269069 is 96096285602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16780093444 + 3878175625 = 129538^2 + 62275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20658269069 is a prime.

It is a super-3 number, since 3×20658269069³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20658269069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20658269063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10329134534 + 10329134535.

It is an arithmetic number, because the mean of its divisors is an integer number (10329134535).

Almost surely, 2^20658269069 is an apocalyptic number.

It is an amenable number.

20658269069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20658269069 is an equidigital number, since it uses as much as digits as its factorization.

20658269069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 20658269069 in words is "twenty billion, six hundred fifty-eight million, two hundred sixty-nine thousand, sixty-nine".