20189011 has 2 divisors, whose sum is σ = 20189012. Its totient is φ = 20189010.

The previous prime is 20188997. The next prime is 20189021. The reversal of 20189011 is 11098102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20189011 - 2¹⁵ = 20156243 is a prime.

It is not a weakly prime, because it can be changed into another prime (20189021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10094505 + 10094506.

It is an arithmetic number, because the mean of its divisors is an integer number (10094506).

Almost surely, 2^20189011 is an apocalyptic number.

20189011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20189011 is an equidigital number, since it uses as much as digits as its factorization.

20189011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 20189011 is about 4493.2183343345. The cubic root of 20189011 is about 272.2941733329.

Subtracting from 20189011 its reverse (11098102), we obtain a palindrome (9090909).

The spelling of 20189011 in words is "twenty million, one hundred eighty-nine thousand, eleven".