19920198 has 16 divisors (see below), whose sum is σ = 40688640. Its totient is φ = 6498696.

The previous prime is 19920181. The next prime is 19920203. The reversal of 19920198 is 89102991.

It is a happy number.

It is a super-3 number, since 3×19920198³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35038 + ... + 35601.

It is an arithmetic number, because the mean of its divisors is an integer number (2543040).

Almost surely, 2^19920198 is an apocalyptic number.

19920198 is an abundant number, since it is smaller than the sum of its proper divisors (20768442).

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

19920198 is a wasteful number, since it uses less digits than its factorization.

19920198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70691.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 19920198 is about 4463.2049023096. The cubic root of 19920198 is about 271.0802538238.

The spelling of 19920198 in words is "nineteen million, nine hundred twenty thousand, one hundred ninety-eight".