20144859 has 8 divisors (see below), whose sum is σ = 30696960. Its totient is φ = 11511336.

The previous prime is 20144857. The next prime is 20144869. The reversal of 20144859 is 95844102.

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

It is not a de Polignac number, because 20144859 - 2¹ = 20144857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20144857) 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, 479619 + ... + 479660.

It is an arithmetic number, because the mean of its divisors is an integer number (3837120).

Almost surely, 2^20144859 is an apocalyptic number.

20144859 is a deficient number, since it is larger than the sum of its proper divisors (10552101).

20144859 is an equidigital number, since it uses as much as digits as its factorization.

20144859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959289.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 20144859 is about 4488.3024630700. The cubic root of 20144859 is about 272.0955321511.

The spelling of 20144859 in words is "twenty million, one hundred forty-four thousand, eight hundred fifty-nine".