20025845 has 16 divisors (see below), whose sum is σ = 28351488. Its totient is φ = 13288320.

The previous prime is 20025833. The next prime is 20025853. The reversal of 20025845 is 54852002.

It is not a de Polignac number, because 20025845 - 2⁶ = 20025781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8144 + ... + 10313.

It is an arithmetic number, because the mean of its divisors is an integer number (1771968).

Almost surely, 2^20025845 is an apocalyptic number.

It is an amenable number.

20025845 is a deficient number, since it is larger than the sum of its proper divisors (8325643).

20025845 is a wasteful number, since it uses less digits than its factorization.

20025845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18500.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20025845 is about 4475.0245809381. The cubic root of 20025845 is about 271.5586348696.

Adding to 20025845 its reverse (54852002), we get a palindrome (74877847).

The spelling of 20025845 in words is "twenty million, twenty-five thousand, eight hundred forty-five".