20510122 has 4 divisors (see below), whose sum is σ = 30765186. Its totient is φ = 10255060.

The previous prime is 20510071. The next prime is 20510137. The reversal of 20510122 is 22101502.

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., 12047841 + 8462281 = 3471^2 + 2909^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5127529 + ... + 5127532.

Almost surely, 2^20510122 is an apocalyptic number.

20510122 is a deficient number, since it is larger than the sum of its proper divisors (10255064).

20510122 is a wasteful number, since it uses less digits than its factorization.

20510122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10255063.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20510122 is about 4528.8102190310. The cubic root of 20510122 is about 273.7302209044.

Adding to 20510122 its reverse (22101502), we get a palindrome (42611624).

The spelling of 20510122 in words is "twenty million, five hundred ten thousand, one hundred twenty-two".