20018122 has 4 divisors (see below), whose sum is σ = 30027186. Its totient is φ = 10009060.

The previous prime is 20018113. The next prime is 20018161. The reversal of 20018122 is 22181002.

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

It can be written as a sum of positive squares in only one way, i.e., 13315201 + 6702921 = 3649^2 + 2589^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20018096 and 20018105.

It is an unprimeable number.

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, 5004529 + ... + 5004532.

Almost surely, 2^20018122 is an apocalyptic number.

20018122 is a deficient number, since it is larger than the sum of its proper divisors (10009064).

20018122 is a wasteful number, since it uses less digits than its factorization.

20018122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10009063.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20018122 is about 4474.1615974392. The cubic root of 20018122 is about 271.5237213700.

Adding to 20018122 its reverse (22181002), we get a palindrome (42199124).

The spelling of 20018122 in words is "twenty million, eighteen thousand, one hundred twenty-two".