20243529 has 6 divisors (see below), whose sum is σ = 29240666. Its totient is φ = 13495680.

The previous prime is 20243507. The next prime is 20243533. The reversal of 20243529 is 92534202.

20243529 is a `hidden beast` number, since 202 + 435 + 29 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14837904 + 5405625 = 3852^2 + 2325^2 .

It is not a de Polignac number, because 20243529 - 2⁹ = 20243017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20243579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1124632 + ... + 1124649.

Almost surely, 2^20243529 is an apocalyptic number.

It is an amenable number.

20243529 is a deficient number, since it is larger than the sum of its proper divisors (8997137).

20243529 is a wasteful number, since it uses less digits than its factorization.

20243529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249287 (or 2249284 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20243529 is about 4499.2809425507. The cubic root of 20243529 is about 272.5390522826.

The spelling of 20243529 in words is "twenty million, two hundred forty-three thousand, five hundred twenty-nine".