20020311522 has 12 divisors (see below), whose sum is σ = 43377341670. Its totient is φ = 6673437168.

The previous prime is 20020311499. The next prime is 20020311529. The reversal of 20020311522 is 22511302002.

It can be written as a sum of positive squares in only one way, i.e., 10506455001 + 9513856521 = 102501^2 + 97539^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1112239529 = 20020311522 / (2 + 0 + 0 + 2 + 0 + 3 + 1 + 1 + 5 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20020311495 and 20020311504.

It is not an unprimeable number, because it can be changed into a prime (20020311529) 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, 556119747 + ... + 556119782.

Almost surely, 2^20020311522 is an apocalyptic number.

20020311522 is an abundant number, since it is smaller than the sum of its proper divisors (23357030148).

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

20020311522 is a wasteful number, since it uses less digits than its factorization.

20020311522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112239537 (or 1112239534 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20020311522 its reverse (22511302002), we get a palindrome (42531613524).

The spelling of 20020311522 in words is "twenty billion, twenty million, three hundred eleven thousand, five hundred twenty-two".