20012522 has 4 divisors (see below), whose sum is σ = 30018786. Its totient is φ = 10006260.

The previous prime is 20012479. The next prime is 20012543. The reversal of 20012522 is 22521002.

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., 15928081 + 4084441 = 3991^2 + 2021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20012497 and 20012506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003129 + ... + 5003132.

Almost surely, 2^20012522 is an apocalyptic number.

20012522 is a deficient number, since it is larger than the sum of its proper divisors (10006264).

20012522 is a wasteful number, since it uses less digits than its factorization.

20012522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006263.

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

The square root of 20012522 is about 4473.5357380935. The cubic root of 20012522 is about 271.4983997364.

Adding to 20012522 its reverse (22521002), we get a palindrome (42533524).

The spelling of 20012522 in words is "twenty million, twelve thousand, five hundred twenty-two".