20620859 has 8 divisors (see below), whose sum is σ = 24327168. Its totient is φ = 17104680.

The previous prime is 20620849. The next prime is 20620861. The reversal of 20620859 is 95802602.

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 20620859 - 2⁴ = 20620843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20620849) 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, 47297 + ... + 47730.

It is an arithmetic number, because the mean of its divisors is an integer number (3040896).

Almost surely, 2^20620859 is an apocalyptic number.

20620859 is a deficient number, since it is larger than the sum of its proper divisors (3706309).

20620859 is an equidigital number, since it uses as much as digits as its factorization.

20620859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95065.

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

The square root of 20620859 is about 4541.0195991649. The cubic root of 20620859 is about 274.2219727900.

The spelling of 20620859 in words is "twenty million, six hundred twenty thousand, eight hundred fifty-nine".