20500869 has 8 divisors (see below), whose sum is σ = 27371520. Its totient is φ = 13648736.

The previous prime is 20500859. The next prime is 20500871. The reversal of 20500869 is 96800502.

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 20500869 - 2⁷ = 20500741 is a prime.

It is a super-2 number, since 2×20500869² = 840571259510322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500859) 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, 1797 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (3421440).

Almost surely, 2^20500869 is an apocalyptic number.

It is an amenable number.

20500869 is a deficient number, since it is larger than the sum of its proper divisors (6870651).

20500869 is an equidigital number, since it uses as much as digits as its factorization.

20500869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9259.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20500869 is about 4527.7885330479. The cubic root of 20500869 is about 273.6890508792.

The spelling of 20500869 in words is "twenty million, five hundred thousand, eight hundred sixty-nine".