20189361 has 4 divisors (see below), whose sum is σ = 26919152. Its totient is φ = 13459572.

The previous prime is 20189359. The next prime is 20189363. The reversal of 20189361 is 16398102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20189359) and next prime (20189363).

It is not a de Polignac number, because 20189361 - 2¹ = 20189359 is a prime.

It is a super-2 number, since 2×20189361² = 815220595176642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20189363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3364891 + ... + 3364896.

It is an arithmetic number, because the mean of its divisors is an integer number (6729788).

Almost surely, 2^20189361 is an apocalyptic number.

It is an amenable number.

20189361 is a deficient number, since it is larger than the sum of its proper divisors (6729791).

20189361 is an equidigital number, since it uses as much as digits as its factorization.

20189361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729790.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 20189361 is about 4493.2572817501. The cubic root of 20189361 is about 272.2957468359.

The spelling of 20189361 in words is "twenty million, one hundred eighty-nine thousand, three hundred sixty-one".