18306011889 has 24 divisors (see below), whose sum is σ = 28854540000. Its totient is φ = 11091205440.

The previous prime is 18306011887. The next prime is 18306011921. The reversal of 18306011889 is 98811060381.

18306011889 is a `hidden beast` number, since 1 + 8 + 30 + 601 + 1 + 8 + 8 + 9 = 666.

It is not a de Polignac number, because 18306011889 - 2¹ = 18306011887 is a prime.

It is a super-2 number, since 2×18306011889² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18306011887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324237 + ... + 376485.

It is an arithmetic number, because the mean of its divisors is an integer number (1202272500).

Almost surely, 2^18306011889 is an apocalyptic number.

It is an amenable number.

18306011889 is a deficient number, since it is larger than the sum of its proper divisors (10548528111).

18306011889 is a wasteful number, since it uses less digits than its factorization.

18306011889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55805 (or 55802 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 18306011889 in words is "eighteen billion, three hundred six million, eleven thousand, eight hundred eighty-nine".