168016820 has 12 divisors (see below), whose sum is σ = 352835364. Its totient is φ = 67206720.

The previous prime is 168016813. The next prime is 168016853. The reversal of 168016820 is 28610861.

168016820 is digitally balanced in base 2, 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 2 ways, for example, as 104080804 + 63936016 = 10202^2 + 7996^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200401 + ... + 4200440.

It is an arithmetic number, because the mean of its divisors is an integer number (29402947).

Almost surely, 2^168016820 is an apocalyptic number.

168016820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168016820 is an abundant number, since it is smaller than the sum of its proper divisors (184818544).

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

168016820 is a wasteful number, since it uses less digits than its factorization.

168016820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400850 (or 8400848 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 168016820 is about 12962.1302261627. The cubic root of 168016820 is about 551.8032493858.

The spelling of 168016820 in words is "one hundred sixty-eight million, sixteen thousand, eight hundred twenty".