201668020 has 24 divisors (see below), whose sum is σ = 437165568. Its totient is φ = 78064800.

The previous prime is 201668017. The next prime is 201668041. The reversal of 201668020 is 20866102.

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, 162016 + ... + 163255.

It is an arithmetic number, because the mean of its divisors is an integer number (18215232).

Almost surely, 2^201668020 is an apocalyptic number.

201668020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201668020 is an abundant number, since it is smaller than the sum of its proper divisors (235497548).

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

201668020 is a wasteful number, since it uses less digits than its factorization.

201668020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325311 (or 325309 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 201668020 is about 14200.9865854454. The cubic root of 201668020 is about 586.4248221202.

The spelling of 201668020 in words is "two hundred one million, six hundred sixty-eight thousand, twenty".