20530029 has 16 divisors (see below), whose sum is σ = 30431744. Its totient is φ = 12225600.

The previous prime is 20530021. The next prime is 20530039. The reversal of 20530029 is 92003502.

It is not a de Polignac number, because 20530029 - 2³ = 20530021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20529987 and 20530014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7282 + ... + 9699.

It is an arithmetic number, because the mean of its divisors is an integer number (1901984).

Almost surely, 2^20530029 is an apocalyptic number.

It is an amenable number.

20530029 is a deficient number, since it is larger than the sum of its proper divisors (9901715).

20530029 is a wasteful number, since it uses less digits than its factorization.

20530029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17028.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 20530029 is about 4531.0075038561. The cubic root of 20530029 is about 273.8187525651.

The spelling of 20530029 in words is "twenty million, five hundred thirty thousand, twenty-nine".