20255859 has 16 divisors (see below), whose sum is σ = 32317600. Its totient is φ = 12464928.

The previous prime is 20255839. The next prime is 20255897. The reversal of 20255859 is 95855202.

It is not a de Polignac number, because 20255859 - 2⁸ = 20255603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20255839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28504 + ... + 29205.

It is an arithmetic number, because the mean of its divisors is an integer number (2019850).

Almost surely, 2^20255859 is an apocalyptic number.

20255859 is a deficient number, since it is larger than the sum of its proper divisors (12061741).

20255859 is a wasteful number, since it uses less digits than its factorization.

20255859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57731 (or 57725 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 20255859 is about 4500.6509529178. The cubic root of 20255859 is about 272.5943740678.

The spelling of 20255859 in words is "twenty million, two hundred fifty-five thousand, eight hundred fifty-nine".