18289310020 has 12 divisors (see below), whose sum is σ = 38407551084. Its totient is φ = 7315724000.

The previous prime is 18289310009. The next prime is 18289310029. The reversal of 18289310020 is 2001398281.

It can be written as a sum of positive squares in 2 ways, for example, as 4643332164 + 13645977856 = 68142^2 + 116816^2 .

It is a super-2 number, since 2×18289310020² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18289310029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457232731 + ... + 457232770.

It is an arithmetic number, because the mean of its divisors is an integer number (3200629257).

Almost surely, 2^18289310020 is an apocalyptic number.

18289310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18289310020 is an abundant number, since it is smaller than the sum of its proper divisors (20118241064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18289310020 is a wasteful number, since it uses less digits than its factorization.

18289310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914465510 (or 914465508 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 18289310020 in words is "eighteen billion, two hundred eighty-nine million, three hundred ten thousand, twenty".