206189816 has 32 divisors (see below), whose sum is σ = 452115840. Its totient is φ = 86311008.

The previous prime is 206189803. The next prime is 206189849. The reversal of 206189816 is 618981602.

It is a super-2 number, since 2×206189816² = 85028480444227712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40406 + ... + 45221.

It is an arithmetic number, because the mean of its divisors is an integer number (14128620).

Almost surely, 2^206189816 is an apocalyptic number.

It is an amenable number.

206189816 is an abundant number, since it is smaller than the sum of its proper divisors (245926024).

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

206189816 is a wasteful number, since it uses less digits than its factorization.

206189816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85683 (or 85679 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 206189816 is about 14359.3111255380. The cubic root of 206189816 is about 590.7754010600.

The spelling of 206189816 in words is "two hundred six million, one hundred eighty-nine thousand, eight hundred sixteen".