20205122 has 8 divisors (see below), whose sum is σ = 34637376. Its totient is φ = 8659332.

The previous prime is 20205121. The next prime is 20205139. The reversal of 20205122 is 22150202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 1443223 = 20205122 / (2 + 0 + 2 + 0 + 5 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20205097 and 20205106.

It is not an unprimeable number, because it can be changed into a prime (20205121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721598 + ... + 721625.

It is an arithmetic number, because the mean of its divisors is an integer number (4329672).

Almost surely, 2^20205122 is an apocalyptic number.

20205122 is a deficient number, since it is larger than the sum of its proper divisors (14432254).

20205122 is a wasteful number, since it uses less digits than its factorization.

20205122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443232.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20205122 is about 4495.0107897535. The cubic root of 20205122 is about 272.3665850854.

Adding to 20205122 its reverse (22150202), we get a palindrome (42355324).

The spelling of 20205122 in words is "twenty million, two hundred five thousand, one hundred twenty-two".