20010522 has 48 divisors (see below), whose sum is σ = 48180960. Its totient is φ = 5517792.

The previous prime is 20010517. The next prime is 20010533. The reversal of 20010522 is 22501002.

It is a junction number, because it is equal to n+sod(n) for n = 20010498 and 20010507.

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 in 23 ways as a sum of consecutive naturals, for example, 7353 + ... + 9699.

It is an arithmetic number, because the mean of its divisors is an integer number (1003770).

Almost surely, 2^20010522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20010522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24090480).

20010522 is an abundant number, since it is smaller than the sum of its proper divisors (28170438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20010522 is a wasteful number, since it uses less digits than its factorization.

20010522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20010522 is about 4473.3121956778. The cubic root of 20010522 is about 271.4893551511.

Adding to 20010522 its reverse (22501002), we get a palindrome (42511524).

The spelling of 20010522 in words is "twenty million, ten thousand, five hundred twenty-two".