20189529 has 6 divisors (see below), whose sum is σ = 29162666. Its totient is φ = 13459680.

The previous prime is 20189513. The next prime is 20189549. The reversal of 20189529 is 92598102.

It can be written as a sum of positive squares in only one way, i.e., 12638025 + 7551504 = 3555^2 + 2748^2 .

It is not a de Polignac number, because 20189529 - 2⁴ = 20189513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20189493 and 20189502.

It is not an unprimeable number, because it can be changed into a prime (20189549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1121632 + ... + 1121649.

Almost surely, 2^20189529 is an apocalyptic number.

It is an amenable number.

20189529 is a deficient number, since it is larger than the sum of its proper divisors (8973137).

20189529 is a wasteful number, since it uses less digits than its factorization.

20189529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243287 (or 2243284 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 20189529 is about 4493.2759763896. The cubic root of 20189529 is about 272.2965021109.

The spelling of 20189529 in words is "twenty million, one hundred eighty-nine thousand, five hundred twenty-nine".