20250689 has 8 divisors (see below), whose sum is σ = 21500640. Its totient is φ = 19007296.

The previous prime is 20250677. The next prime is 20250697. The reversal of 20250689 is 98605202.

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 20250689 - 2⁴ = 20250673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20250089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5702 + ... + 8544.

It is an arithmetic number, because the mean of its divisors is an integer number (2687580).

Almost surely, 2^20250689 is an apocalyptic number.

It is an amenable number.

20250689 is a deficient number, since it is larger than the sum of its proper divisors (1249951).

20250689 is a wasteful number, since it uses less digits than its factorization.

20250689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20250689 is about 4500.0765549044. The cubic root of 20250689 is about 272.5711802381.

The spelling of 20250689 in words is "twenty million, two hundred fifty thousand, six hundred eighty-nine".