20220061 has 4 divisors (see below), whose sum is σ = 20237500. Its totient is φ = 20202624.

The previous prime is 20220049. The next prime is 20220073. The reversal of 20220061 is 16002202.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20220049) and next prime (20220073).

It can be written as a sum of positive squares in 2 ways, for example, as 8964036 + 11256025 = 2994^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220061 - 2¹¹ = 20218013 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220041) by changing a digit.

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, 6846 + ... + 9343.

It is an arithmetic number, because the mean of its divisors is an integer number (5059375).

Almost surely, 2^20220061 is an apocalyptic number.

It is an amenable number.

20220061 is a deficient number, since it is larger than the sum of its proper divisors (17439).

20220061 is a wasteful number, since it uses less digits than its factorization.

20220061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17438.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20220061 is about 4496.6722139822. The cubic root of 20220061 is about 272.4336948349.

Adding to 20220061 its reverse (16002202), we get a palindrome (36222263).

The spelling of 20220061 in words is "twenty million, two hundred twenty thousand, sixty-one".