20467189 has 2 divisors, whose sum is σ = 20467190. Its totient is φ = 20467188.

The previous prime is 20467177. The next prime is 20467247. The reversal of 20467189 is 98176402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 9872164 = 3255^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 20467189 - 2⁵ = 20467157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20467129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233594 + 10233595.

It is an arithmetic number, because the mean of its divisors is an integer number (10233595).

Almost surely, 2^20467189 is an apocalyptic number.

It is an amenable number.

20467189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20467189 is an equidigital number, since it uses as much as digits as its factorization.

20467189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20467189 is about 4524.0677492717. The cubic root of 20467189 is about 273.5390913870.

The spelling of 20467189 in words is "twenty million, four hundred sixty-seven thousand, one hundred eighty-nine".