20448285 has 32 divisors (see below), whose sum is σ = 38441088. Its totient is φ = 9150720.

The previous prime is 20448271. The next prime is 20448287. The reversal of 20448285 is 58284402.

It is a happy number.

It is not a de Polignac number, because 20448285 - 2¹⁶ = 20382749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2622 + ... + 6911.

It is an arithmetic number, because the mean of its divisors is an integer number (1201284).

Almost surely, 2^20448285 is an apocalyptic number.

It is an amenable number.

20448285 is a deficient number, since it is larger than the sum of its proper divisors (17992803).

20448285 is a wasteful number, since it uses less digits than its factorization.

20448285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9565.

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 20448285 is about 4521.9779964082. The cubic root of 20448285 is about 273.4548496311.

The spelling of 20448285 in words is "twenty million, four hundred forty-eight thousand, two hundred eighty-five".