18428972513369 has 4 divisors (see below), whose sum is σ = 20104333650960. Its totient is φ = 16753611375780.

The previous prime is 18428972513297. The next prime is 18428972513377. The reversal of 18428972513369 is 96331527982481.

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 18428972513369 - 2⁴⁴ = 836786468953 is a prime.

It is a super-2 number, since 2×18428972513369² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18428972513299 and 18428972513308.

It is not an unprimeable number, because it can be changed into a prime (18428972513669) 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, 837680568779 + ... + 837680568800.

It is an arithmetic number, because the mean of its divisors is an integer number (5026083412740).

Almost surely, 2^{18428972513369} is an apocalyptic number.

It is an amenable number.

18428972513369 is a deficient number, since it is larger than the sum of its proper divisors (1675361137591).

18428972513369 is a wasteful number, since it uses less digits than its factorization.

18428972513369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675361137590.

The product of its digits is 156764160, while the sum is 68.

The spelling of 18428972513369 in words is "eighteen trillion, four hundred twenty-eight billion, nine hundred seventy-two million, five hundred thirteen thousand, three hundred sixty-nine".