168685002020 has 24 divisors (see below), whose sum is σ = 354319990584. Its totient is φ = 67458479616.

The previous prime is 168685001993. The next prime is 168685002023. The reversal of 168685002020 is 20200586861.

168685002020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 116741122276 + 51943879744 = 341674^2 + 227912^2 .

It is not an unprimeable number, because it can be changed into a prime (168685002023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880757 + ... + 1055036.

It is an arithmetic number, because the mean of its divisors is an integer number (14763332941).

Almost surely, 2^168685002020 is an apocalyptic number.

168685002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168685002020 is an abundant number, since it is smaller than the sum of its proper divisors (185634988564).

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

168685002020 is a wasteful number, since it uses less digits than its factorization.

168685002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940159 (or 1940157 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

Adding to 168685002020 its reverse (20200586861), we get a palindrome (188885588881).

The spelling of 168685002020 in words is "one hundred sixty-eight billion, six hundred eighty-five million, two thousand, twenty".