20648485 has 16 divisors (see below), whose sum is σ = 29111040. Its totient is φ = 13861440.

The previous prime is 20648477. The next prime is 20648501. The reversal of 20648485 is 58484602.

It is not a de Polignac number, because 20648485 - 2³ = 20648477 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13725 + ... + 15154.

It is an arithmetic number, because the mean of its divisors is an integer number (1819440).

Almost surely, 2^20648485 is an apocalyptic number.

It is an amenable number.

20648485 is a deficient number, since it is larger than the sum of its proper divisors (8462555).

20648485 is a wasteful number, since it uses less digits than its factorization.

20648485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28908.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 20648485 is about 4544.0604089294. The cubic root of 20648485 is about 274.3443775788.

The spelling of 20648485 in words is "twenty million, six hundred forty-eight thousand, four hundred eighty-five".