18569680987069 has 4 divisors (see below), whose sum is σ = 18749969152096. Its totient is φ = 18389392822044.

The previous prime is 18569680986971. The next prime is 18569680987103. The reversal of 18569680987069 is 96078908696581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18569680987069 - 2¹¹ = 18569680985021 is a prime.

It is a super-2 number, since 2×18569680987069² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18569680986983 and 18569680987001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18569680987769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90144082359 + ... + 90144082564.

It is an arithmetic number, because the mean of its divisors is an integer number (4687492288024).

Almost surely, 2^{18569680987069} is an apocalyptic number.

It is an amenable number.

18569680987069 is a deficient number, since it is larger than the sum of its proper divisors (180288165027).

18569680987069 is a wasteful number, since it uses less digits than its factorization.

18569680987069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180288165026.

The product of its (nonzero) digits is 2821754880, while the sum is 82.

The spelling of 18569680987069 in words is "eighteen trillion, five hundred sixty-nine billion, six hundred eighty million, nine hundred eighty-seven thousand, sixty-nine".