20529243 has 12 divisors (see below), whose sum is σ = 33889648. Its totient is φ = 11730960.

The previous prime is 20529221. The next prime is 20529259. The reversal of 20529243 is 34292502.

It is not a de Polignac number, because 20529243 - 2⁵ = 20529211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20529203) 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 11 ways as a sum of consecutive naturals, for example, 162868 + ... + 162993.

Almost surely, 2^20529243 is an apocalyptic number.

20529243 is a deficient number, since it is larger than the sum of its proper divisors (13360405).

20529243 is a wasteful number, since it uses less digits than its factorization.

20529243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325874 (or 325871 counting only the distinct ones).

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

The square root of 20529243 is about 4530.9207673496. The cubic root of 20529243 is about 273.8152581020.

The spelling of 20529243 in words is "twenty million, five hundred twenty-nine thousand, two hundred forty-three".