20850609 has 8 divisors (see below), whose sum is σ = 29939392. Its totient is φ = 12831120.

The previous prime is 20850607. The next prime is 20850611. The reversal of 20850609 is 90605802.

It is an interprime number because it is at equal distance from previous prime (20850607) and next prime (20850611).

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

It is not a de Polignac number, because 20850609 - 2¹ = 20850607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20850607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267277 + ... + 267354.

It is an arithmetic number, because the mean of its divisors is an integer number (3742424).

Almost surely, 2^20850609 is an apocalyptic number.

It is an amenable number.

20850609 is a deficient number, since it is larger than the sum of its proper divisors (9088783).

20850609 is a wasteful number, since it uses less digits than its factorization.

20850609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534647.

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

The square root of 20850609 is about 4566.2467081839. The cubic root of 20850609 is about 275.2366403872.

The spelling of 20850609 in words is "twenty million, eight hundred fifty thousand, six hundred nine".