18257965869 has 96 divisors (see below), whose sum is σ = 30826358784. Its totient is φ = 9503619840.

The previous prime is 18257965867. The next prime is 18257965877. The reversal of 18257965869 is 96856975281.

It is not a de Polignac number, because 18257965869 - 2¹ = 18257965867 is a prime.

It is a super-4 number, since 4×18257965869⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18257965867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4744104 + ... + 4747950.

It is an arithmetic number, because the mean of its divisors is an integer number (321107904).

Almost surely, 2^18257965869 is an apocalyptic number.

It is an amenable number.

18257965869 is a deficient number, since it is larger than the sum of its proper divisors (12568392915).

18257965869 is a wasteful number, since it uses less digits than its factorization.

18257965869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947 (or 3934 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 66.

The spelling of 18257965869 in words is "eighteen billion, two hundred fifty-seven million, nine hundred sixty-five thousand, eight hundred sixty-nine".