20525445 has 24 divisors (see below), whose sum is σ = 35692800. Its totient is φ = 10911456.

The previous prime is 20525437. The next prime is 20525459. The reversal of 20525445 is 54452502.

It is not a de Polignac number, because 20525445 - 2³ = 20525437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19236 + ... + 20274.

It is an arithmetic number, because the mean of its divisors is an integer number (1487200).

Almost surely, 2^20525445 is an apocalyptic number.

It is an amenable number.

20525445 is a deficient number, since it is larger than the sum of its proper divisors (15167355).

20525445 is a wasteful number, since it uses less digits than its factorization.

20525445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 20525445 is about 4530.5016278554. The cubic root of 20525445 is about 273.7983713860.

Adding to 20525445 its reverse (54452502), we get a palindrome (74977947).

The spelling of 20525445 in words is "twenty million, five hundred twenty-five thousand, four hundred forty-five".