20385895 has 16 divisors (see below), whose sum is σ = 25176960. Its totient is φ = 15840000.

The previous prime is 20385887. The next prime is 20385931. The reversal of 20385895 is 59858302.

It is not a de Polignac number, because 20385895 - 2³ = 20385887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26770 + ... + 27520.

It is an arithmetic number, because the mean of its divisors is an integer number (1573560).

Almost surely, 2^20385895 is an apocalyptic number.

20385895 is a deficient number, since it is larger than the sum of its proper divisors (4791065).

20385895 is an equidigital number, since it uses as much as digits as its factorization.

20385895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 20385895 is about 4515.0741965111. The cubic root of 20385895 is about 273.1764525421.

The spelling of 20385895 in words is "twenty million, three hundred eighty-five thousand, eight hundred ninety-five".