20066198 has 4 divisors (see below), whose sum is σ = 30099300. Its totient is φ = 10033098.

The previous prime is 20066197. The next prime is 20066243. The reversal of 20066198 is 89166002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066191) by changing a digit.

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 as a sum of consecutive naturals, namely, 5016548 + ... + 5016551.

It is an arithmetic number, because the mean of its divisors is an integer number (7524825).

Almost surely, 2^20066198 is an apocalyptic number.

20066198 is a deficient number, since it is larger than the sum of its proper divisors (10033102).

20066198 is a wasteful number, since it uses less digits than its factorization.

20066198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10033101.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 20066198 is about 4479.5310022367. The cubic root of 20066198 is about 271.7409135432.

The spelling of 20066198 in words is "twenty million, sixty-six thousand, one hundred ninety-eight".