20220605 has 6 divisors (see below), whose sum is σ = 24276798. Its totient is φ = 16168440.

The previous prime is 20220601. The next prime is 20220619. The reversal of 20220605 is 50602202.

It can be written as a sum of positive squares in only one way, i.e., 16176484 + 4044121 = 4022^2 + 2011^2 .

It is not a de Polignac number, because 20220605 - 2² = 20220601 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 (20220601) 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 in 5 ways as a sum of consecutive naturals, for example, 9050 + ... + 11060.

It is an arithmetic number, because the mean of its divisors is an integer number (4046133).

Almost surely, 2^20220605 is an apocalyptic number.

It is an amenable number.

20220605 is a deficient number, since it is larger than the sum of its proper divisors (4056193).

20220605 is an frugal number, since it uses more digits than its factorization.

20220605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20220605 is about 4496.7327027521. The cubic root of 20220605 is about 272.4361379960.

Adding to 20220605 its reverse (50602202), we get a palindrome (70822807).

The spelling of 20220605 in words is "twenty million, two hundred twenty thousand, six hundred five".