20526645 has 8 divisors (see below), whose sum is σ = 32842656. Its totient is φ = 10947536.

The previous prime is 20526643. The next prime is 20526661. The reversal of 20526645 is 54662502.

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 20526645 - 2¹ = 20526643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20526641) 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, 684207 + ... + 684236.

It is an arithmetic number, because the mean of its divisors is an integer number (4105332).

Almost surely, 2^20526645 is an apocalyptic number.

It is an amenable number.

20526645 is a deficient number, since it is larger than the sum of its proper divisors (12316011).

20526645 is a wasteful number, since it uses less digits than its factorization.

20526645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368451.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 20526645 is about 4530.6340615856. The cubic root of 20526645 is about 273.8037070664.

The spelling of 20526645 in words is "twenty million, five hundred twenty-six thousand, six hundred forty-five".