19700198 has 16 divisors (see below), whose sum is σ = 34089984. Its totient is φ = 8363400.

The previous prime is 19700171. The next prime is 19700209. The reversal of 19700198 is 89100791.

It is a super-3 number, since 3×19700198³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

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, 5078 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (2130624).

Almost surely, 2^19700198 is an apocalyptic number.

19700198 is a deficient number, since it is larger than the sum of its proper divisors (14389786).

19700198 is a wasteful number, since it uses less digits than its factorization.

19700198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13267.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 19700198 is about 4438.4905091709. The cubic root of 19700198 is about 270.0786145108.

The spelling of 19700198 in words is "nineteen million, seven hundred thousand, one hundred ninety-eight".