20522605 has 8 divisors (see below), whose sum is σ = 25292952. Its totient is φ = 15974208.

The previous prime is 20522549. The next prime is 20522609. The reversal of 20522605 is 50622502.

It can be written as a sum of positive squares in 4 ways, for example, as 568516 + 19954089 = 754^2 + 4467^2 .

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 20522605 - 2⁷ = 20522477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522609) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 55282 + ... + 55651.

It is an arithmetic number, because the mean of its divisors is an integer number (3161619).

Almost surely, 2^20522605 is an apocalyptic number.

It is an amenable number.

20522605 is a deficient number, since it is larger than the sum of its proper divisors (4770347).

20522605 is a wasteful number, since it uses less digits than its factorization.

20522605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110975.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20522605 is about 4530.1881859367. The cubic root of 20522605 is about 273.7857427805.

The spelling of 20522605 in words is "twenty million, five hundred twenty-two thousand, six hundred five".