209814190 has 16 divisors (see below), whose sum is σ = 377958960. Its totient is φ = 83860480.

The previous prime is 209814173. The next prime is 209814203. The reversal of 209814190 is 91418902.

It is a super-2 number, since 2×209814190² = 88043988650712200, 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6645 + ... + 21535.

It is an arithmetic number, because the mean of its divisors is an integer number (23622435).

Almost surely, 2^209814190 is an apocalyptic number.

209814190 is a deficient number, since it is larger than the sum of its proper divisors (168144770).

209814190 is a wasteful number, since it uses less digits than its factorization.

209814190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16307.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 209814190 is about 14484.9642733422. The cubic root of 209814190 is about 594.2168355877.

The spelling of 209814190 in words is "two hundred nine million, eight hundred fourteen thousand, one hundred ninety".