20525145 has 8 divisors (see below), whose sum is σ = 32840256. Its totient is φ = 10946736.

The previous prime is 20525129. The next prime is 20525159. The reversal of 20525145 is 54152502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20525145 - 2⁴ = 20525129 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 684157 + ... + 684186.

It is an arithmetic number, because the mean of its divisors is an integer number (4105032).

Almost surely, 2^20525145 is an apocalyptic number.

It is an amenable number.

20525145 is a deficient number, since it is larger than the sum of its proper divisors (12315111).

20525145 is a wasteful number, since it uses less digits than its factorization.

20525145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368351.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20525145 is about 4530.4685188179. The cubic root of 20525145 is about 273.7970374334.

Adding to 20525145 its reverse (54152502), we get a palindrome (74677647).

The spelling of 20525145 in words is "twenty million, five hundred twenty-five thousand, one hundred forty-five".