20111198 has 8 divisors (see below), whose sum is σ = 30194040. Its totient is φ = 10046520.

The previous prime is 20111183. The next prime is 20111213. The reversal of 20111198 is 89111102.

It is an interprime number because it is at equal distance from previous prime (20111183) and next prime (20111213).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313 + ... + 6476.

It is an arithmetic number, because the mean of its divisors is an integer number (3774255).

Almost surely, 2^20111198 is an apocalyptic number.

20111198 is a deficient number, since it is larger than the sum of its proper divisors (10082842).

20111198 is a wasteful number, since it uses less digits than its factorization.

20111198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9082.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 20111198 is about 4484.5510366145. The cubic root of 20111198 is about 271.9438952189.

The spelling of 20111198 in words is "twenty million, one hundred eleven thousand, one hundred ninety-eight".