20000522 has 4 divisors (see below), whose sum is σ = 30000786. Its totient is φ = 10000260.

The previous prime is 20000507. The next prime is 20000531. The reversal of 20000522 is 22500002.

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., 19971961 + 28561 = 4469^2 + 169^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000129 + ... + 5000132.

Almost surely, 2^20000522 is an apocalyptic number.

20000522 is a deficient number, since it is larger than the sum of its proper divisors (10000264).

20000522 is a wasteful number, since it uses less digits than its factorization.

20000522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000263.

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 20000522 is about 4472.1943159930. The cubic root of 20000522 is about 271.4441231823. Note that the first 3 decimals are identical.

Adding to 20000522 its reverse (22500002), we get a palindrome (42500524).

The spelling of 20000522 in words is "twenty million, five hundred twenty-two", and thus it is an aban number.