20522440242 has 12 divisors (see below), whose sum is σ = 44465287230. Its totient is φ = 6840813408.

The previous prime is 20522440241. The next prime is 20522440261. The reversal of 20522440242 is 24204422502.

It can be written as a sum of positive squares in only one way, i.e., 19807466121 + 714974121 = 140739^2 + 26739^2 .

It is a super-2 number, since 2×20522440242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20522440241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570067767 + ... + 570067802.

Almost surely, 2^20522440242 is an apocalyptic number.

20522440242 is an abundant number, since it is smaller than the sum of its proper divisors (23942846988).

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

20522440242 is a wasteful number, since it uses less digits than its factorization.

20522440242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140135577 (or 1140135574 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

Adding to 20522440242 its reverse (24204422502), we get a palindrome (44726862744).

The spelling of 20522440242 in words is "twenty billion, five hundred twenty-two million, four hundred forty thousand, two hundred forty-two".