20525449 has 8 divisors (see below), whose sum is σ = 23602880. Its totient is φ = 17484336.

The previous prime is 20525437. The next prime is 20525459. The reversal of 20525449 is 94452502.

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

It is a cyclic number.

It is not a de Polignac number, because 20525449 - 2⁹ = 20524937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20525449.

It is not an unprimeable number, because it can be changed into a prime (20525419) by changing a digit.

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, 7854 + ... + 10135.

It is an arithmetic number, because the mean of its divisors is an integer number (2950360).

Almost surely, 2^20525449 is an apocalyptic number.

It is an amenable number.

20525449 is a deficient number, since it is larger than the sum of its proper divisors (3077431).

20525449 is a wasteful number, since it uses less digits than its factorization.

20525449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18159.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 20525449 is about 4530.5020693076. The cubic root of 20525449 is about 273.7983891720.

The spelling of 20525449 in words is "twenty million, five hundred twenty-five thousand, four hundred forty-nine".