20198766 has 32 divisors (see below), whose sum is σ = 46303488. Its totient is φ = 5754240.

The previous prime is 20198753. The next prime is 20198779. The reversal of 20198766 is 66789102.

It is an interprime number because it is at equal distance from previous prime (20198753) and next prime (20198779).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 15 ways as a sum of consecutive naturals, for example, 24501 + ... + 25311.

It is an arithmetic number, because the mean of its divisors is an integer number (1446984).

Almost surely, 2^20198766 is an apocalyptic number.

20198766 is an abundant number, since it is smaller than the sum of its proper divisors (26104722).

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

20198766 is a wasteful number, since it uses less digits than its factorization.

20198766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20198766 is about 4494.3037280540. The cubic root of 20198766 is about 272.3380223020.

The spelling of 20198766 in words is "twenty million, one hundred ninety-eight thousand, seven hundred sixty-six".