20652505 has 16 divisors (see below), whose sum is σ = 26417664. Its totient is φ = 15463360.

The previous prime is 20652497. The next prime is 20652521. The reversal of 20652505 is 50525602.

It is not a de Polignac number, because 20652505 - 2³ = 20652497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20652505.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3495 + ... + 7315.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^20652505 is an apocalyptic number.

It is an amenable number.

20652505 is a deficient number, since it is larger than the sum of its proper divisors (5765159).

20652505 is a wasteful number, since it uses less digits than its factorization.

20652505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 20652505 is about 4544.5027230710. The cubic root of 20652505 is about 274.3621802220.

The spelling of 20652505 in words is "twenty million, six hundred fifty-two thousand, five hundred five".