20822285 has 24 divisors (see below), whose sum is σ = 27783168. Its totient is φ = 14968800.

The previous prime is 20822281. The next prime is 20822287. The reversal of 20822285 is 58222802.

It is not a de Polignac number, because 20822285 - 2² = 20822281 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20822281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76700 + ... + 76970.

It is an arithmetic number, because the mean of its divisors is an integer number (1157632).

Almost surely, 2^20822285 is an apocalyptic number.

It is an amenable number.

20822285 is a deficient number, since it is larger than the sum of its proper divisors (6960883).

20822285 is a wasteful number, since it uses less digits than its factorization.

20822285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 20822285 is about 4563.1442010964. The cubic root of 20822285 is about 275.1119544164. Note that the first 3 decimals are identical.

The spelling of 20822285 in words is "twenty million, eight hundred twenty-two thousand, two hundred eighty-five".