168021204 has 24 divisors (see below), whose sum is σ = 422207520. Its totient is φ = 51698784.

The previous prime is 168021179. The next prime is 168021223. The reversal of 168021204 is 402120861.

It is a super-2 number, since 2×168021204² = 56462249987219232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538374 + ... + 538685.

It is an arithmetic number, because the mean of its divisors is an integer number (17591980).

Almost surely, 2^168021204 is an apocalyptic number.

It is an amenable number.

168021204 is an abundant number, since it is smaller than the sum of its proper divisors (254186316).

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

168021204 is a wasteful number, since it uses less digits than its factorization.

168021204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077079 (or 1077077 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 168021204 is about 12962.2993330659. The cubic root of 168021204 is about 551.8080486759.

The spelling of 168021204 in words is "one hundred sixty-eight million, twenty-one thousand, two hundred four".