20220345 has 24 divisors (see below), whose sum is σ = 35153352. Its totient is φ = 10752000.

The previous prime is 20220331. The next prime is 20220349. The reversal of 20220345 is 54302202.

It can be written as a sum of positive squares in 4 ways, for example, as 9566649 + 10653696 = 3093^2 + 3264^2 .

It is not a de Polignac number, because 20220345 - 2⁷ = 20220217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20220349) 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, 28495 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (1464723).

Almost surely, 2^20220345 is an apocalyptic number.

It is an amenable number.

20220345 is a deficient number, since it is larger than the sum of its proper divisors (14933007).

20220345 is a wasteful number, since it uses less digits than its factorization.

20220345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20220345 is about 4496.7037927798. The cubic root of 20220345 is about 272.4349703142.

Adding to 20220345 its reverse (54302202), we get a palindrome (74522547).

The spelling of 20220345 in words is "twenty million, two hundred twenty thousand, three hundred forty-five".