18865737089 has 16 divisors (see below), whose sum is σ = 20351338560. Its totient is φ = 17429760000.

The previous prime is 18865737083. The next prime is 18865737091. The reversal of 18865737089 is 98073756881.

It is a cyclic number.

It is not a de Polignac number, because 18865737089 - 2¹⁶ = 18865671553 is a prime.

It is a super-2 number, since 2×18865737089² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18865737083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3464609 + ... + 3470049.

It is an arithmetic number, because the mean of its divisors is an integer number (1271958660).

Almost surely, 2^18865737089 is an apocalyptic number.

18865737089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18865737089 is a deficient number, since it is larger than the sum of its proper divisors (1485601471).

18865737089 is a wasteful number, since it uses less digits than its factorization.

18865737089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9952.

The product of its (nonzero) digits is 20321280, while the sum is 62.

The spelling of 18865737089 in words is "eighteen billion, eight hundred sixty-five million, seven hundred thirty-seven thousand, eighty-nine".