20022985 has 4 divisors (see below), whose sum is σ = 24027588. Its totient is φ = 16018384.

The previous prime is 20022971. The next prime is 20023001. The reversal of 20022985 is 58922002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14584761 + 5438224 = 3819^2 + 2332^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022985 - 2¹¹ = 20020937 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2002294 + ... + 2002303.

It is an arithmetic number, because the mean of its divisors is an integer number (6006897).

Almost surely, 2^20022985 is an apocalyptic number.

It is an amenable number.

20022985 is a deficient number, since it is larger than the sum of its proper divisors (4004603).

20022985 is an equidigital number, since it uses as much as digits as its factorization.

20022985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004602.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20022985 is about 4474.7050182107. The cubic root of 20022985 is about 271.5457066649.

Adding to 20022985 its reverse (58922002), we get a palindrome (78944987).

The spelling of 20022985 in words is "twenty million, twenty-two thousand, nine hundred eighty-five".