20799198 has 48 divisors (see below), whose sum is σ = 51757056. Its totient is φ = 5913360.

The previous prime is 20799179. The next prime is 20799209. The reversal of 20799198 is 89199702.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 48043 + ... + 48473.

It is an arithmetic number, because the mean of its divisors is an integer number (1078272).

Almost surely, 2^20799198 is an apocalyptic number.

20799198 is an abundant number, since it is smaller than the sum of its proper divisors (30957858).

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

20799198 is a wasteful number, since it uses less digits than its factorization.

20799198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 20799198 is about 4560.6137744826. The cubic root of 20799198 is about 275.0102387372.

The spelling of 20799198 in words is "twenty million, seven hundred ninety-nine thousand, one hundred ninety-eight".