20025805 has 16 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 15356992.

The previous prime is 20025787. The next prime is 20025823. The reversal of 20025805 is 50852002.

It is an interprime number because it is at equal distance from previous prime (20025787) and next prime (20025823).

It is a cyclic number.

It is not a de Polignac number, because 20025805 - 2⁵ = 20025773 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, 23802 + ... + 24628.

It is an arithmetic number, because the mean of its divisors is an integer number (1564920).

Almost surely, 2^20025805 is an apocalyptic number.

It is an amenable number.

20025805 is a deficient number, since it is larger than the sum of its proper divisors (5012915).

20025805 is a wasteful number, since it uses less digits than its factorization.

20025805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 20025805 is about 4475.0201116867. The cubic root of 20025805 is about 271.5584540641.

Adding to 20025805 its reverse (50852002), we get a palindrome (70877807).

The spelling of 20025805 in words is "twenty million, twenty-five thousand, eight hundred five".