20530769 has 8 divisors (see below), whose sum is σ = 23906880. Its totient is φ = 17265456.

The previous prime is 20530759. The next prime is 20530771. The reversal of 20530769 is 96703502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20530769 - 2¹² = 20526673 is a prime.

It is a super-2 number, since 2×20530769² = 843024951462722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20530759) 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 7 ways as a sum of consecutive naturals, for example, 27299 + ... + 28040.

It is an arithmetic number, because the mean of its divisors is an integer number (2988360).

Almost surely, 2^20530769 is an apocalyptic number.

It is an amenable number.

20530769 is a deficient number, since it is larger than the sum of its proper divisors (3376111).

20530769 is an equidigital number, since it uses as much as digits as its factorization.

20530769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55399.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20530769 is about 4531.0891626628. The cubic root of 20530769 is about 273.8220424361.

The spelling of 20530769 in words is "twenty million, five hundred thirty thousand, seven hundred sixty-nine".