20189766 has 8 divisors (see below), whose sum is σ = 40379544. Its totient is φ = 6729920.

The previous prime is 20189759. The next prime is 20189777. The reversal of 20189766 is 66798102.

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

20189766 is an admirable number.

It is a super-2 number, since 2×20189766² = 815253302269512, which contains 22 as substring.

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, 1682475 + ... + 1682486.

It is an arithmetic number, because the mean of its divisors is an integer number (5047443).

Almost surely, 2^20189766 is an apocalyptic number.

20189766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20189766 is a wasteful number, since it uses less digits than its factorization.

20189766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364966.

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

The square root of 20189766 is about 4493.3023490524. The cubic root of 20189766 is about 272.2975675810.

The spelling of 20189766 in words is "twenty million, one hundred eighty-nine thousand, seven hundred sixty-six".