196720218 has 32 divisors (see below), whose sum is σ = 440363520. Its totient is φ = 65092320.

The previous prime is 196720207. The next prime is 196720247. The reversal of 196720218 is 812027691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5898 + ... + 20693.

It is an arithmetic number, because the mean of its divisors is an integer number (13761360).

Almost surely, 2^196720218 is an apocalyptic number.

196720218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

196720218 is an abundant number, since it is smaller than the sum of its proper divisors (243643302).

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

196720218 is a wasteful number, since it uses less digits than its factorization.

196720218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26739 (or 26733 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 196720218 is about 14025.6984852805. The cubic root of 196720218 is about 581.5891988941.

The spelling of 196720218 in words is "one hundred ninety-six million, seven hundred twenty thousand, two hundred eighteen".