18284989811 has 16 divisors (see below), whose sum is σ = 21485979648. Its totient is φ = 15387081600.

The previous prime is 18284989787. The next prime is 18284989831. The reversal of 18284989811 is 11898948281.

It is not a de Polignac number, because 18284989811 - 2¹⁸ = 18284727667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18284989831) 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 15 ways as a sum of consecutive naturals, for example, 1157846 + ... + 1173531.

It is an arithmetic number, because the mean of its divisors is an integer number (1342873728).

Almost surely, 2^18284989811 is an apocalyptic number.

18284989811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18284989811 is a deficient number, since it is larger than the sum of its proper divisors (3200989837).

18284989811 is a wasteful number, since it uses less digits than its factorization.

18284989811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331442.

The product of its digits is 2654208, while the sum is 59.

The spelling of 18284989811 in words is "eighteen billion, two hundred eighty-four million, nine hundred eighty-nine thousand, eight hundred eleven".