20530169 has 16 divisors (see below), whose sum is σ = 23970816. Its totient is φ = 17376000.

The previous prime is 20530163. The next prime is 20530177. The reversal of 20530169 is 96103502.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20530169 is a prime.

It is a super-2 number, since 2×20530169² = 842975678337122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20530163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18344 + ... + 19430.

It is an arithmetic number, because the mean of its divisors is an integer number (1498176).

Almost surely, 2^20530169 is an apocalyptic number.

It is an amenable number.

20530169 is a deficient number, since it is larger than the sum of its proper divisors (3440647).

20530169 is a wasteful number, since it uses less digits than its factorization.

20530169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 20530169 is about 4531.0229529324. The cubic root of 20530169 is about 273.8193749792.

The spelling of 20530169 in words is "twenty million, five hundred thirty thousand, one hundred sixty-nine".