20927285 has 8 divisors (see below), whose sum is σ = 25138176. Its totient is φ = 16724880.

The previous prime is 20927279. The next prime is 20927287. The reversal of 20927285 is 58272902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20927285 - 2¹⁰ = 20926261 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 (20927287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6500 + ... + 9170.

It is an arithmetic number, because the mean of its divisors is an integer number (3142272).

Almost surely, 2^20927285 is an apocalyptic number.

It is an amenable number.

20927285 is a deficient number, since it is larger than the sum of its proper divisors (4210891).

20927285 is a wasteful number, since it uses less digits than its factorization.

20927285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20927285 is about 4574.6349581141. The cubic root of 20927285 is about 275.5736126076.

It can be divided in two parts, 20927 and 285, that added together give a palindrome (21212).

The spelling of 20927285 in words is "twenty million, nine hundred twenty-seven thousand, two hundred eighty-five".