20220637 has 2 divisors, whose sum is σ = 20220638. Its totient is φ = 20220636.

The previous prime is 20220631. The next prime is 20220643. The reversal of 20220637 is 73602202.

It is a balanced prime because it is at equal distance from previous prime (20220631) and next prime (20220643).

It can be written as a sum of positive squares in only one way, i.e., 14584761 + 5635876 = 3819^2 + 2374^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220637 - 2¹¹ = 20218589 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110318 + 10110319.

It is an arithmetic number, because the mean of its divisors is an integer number (10110319).

Almost surely, 2^20220637 is an apocalyptic number.

It is an amenable number.

20220637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220637 is an equidigital number, since it uses as much as digits as its factorization.

20220637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20220637 is about 4496.7362608897. The cubic root of 20220637 is about 272.4362817100.

Adding to 20220637 its reverse (73602202), we get a palindrome (93822839).

The spelling of 20220637 in words is "twenty million, two hundred twenty thousand, six hundred thirty-seven".