20025855 has 12 divisors (see below), whose sum is σ = 34711560. Its totient is φ = 10680432.

The previous prime is 20025853. The next prime is 20025883. The reversal of 20025855 is 55852002.

It is not a de Polignac number, because 20025855 - 2¹ = 20025853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222465 + ... + 222554.

It is an arithmetic number, because the mean of its divisors is an integer number (2892630).

Almost surely, 2^20025855 is an apocalyptic number.

20025855 is a deficient number, since it is larger than the sum of its proper divisors (14685705).

20025855 is a wasteful number, since it uses less digits than its factorization.

20025855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445030 (or 445027 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 20025855 is about 4475.0256982502. The cubic root of 20025855 is about 271.5586800710.

Adding to 20025855 its reverse (55852002), we get a palindrome (75877857).

The spelling of 20025855 in words is "twenty million, twenty-five thousand, eight hundred fifty-five".