20198867 has 8 divisors (see below), whose sum is σ = 21792960. Its totient is φ = 18610560.

The previous prime is 20198837. The next prime is 20198903. The reversal of 20198867 is 76889102.

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

It is a cyclic number.

It is not a de Polignac number, because 20198867 - 2⁶ = 20198803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20198837) 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 in 7 ways as a sum of consecutive naturals, for example, 8267 + ... + 10427.

It is an arithmetic number, because the mean of its divisors is an integer number (2724120).

Almost surely, 2^20198867 is an apocalyptic number.

20198867 is a deficient number, since it is larger than the sum of its proper divisors (1594093).

20198867 is a wasteful number, since it uses less digits than its factorization.

20198867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 20198867 is about 4494.3149644857. The cubic root of 20198867 is about 272.3384762257.

The spelling of 20198867 in words is "twenty million, one hundred ninety-eight thousand, eight hundred sixty-seven".