20522313252 has 144 divisors (see below), whose sum is σ = 61617733632. Its totient is φ = 5850623520.

The previous prime is 20522313241. The next prime is 20522313277. The reversal of 20522313252 is 25231322502.

20522313252 is a `hidden beast` number, since 2 + 0 + 522 + 3 + 132 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3337693 + ... + 3343835.

It is an arithmetic number, because the mean of its divisors is an integer number (427900928).

Almost surely, 2^20522313252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20522313252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30808866816).

20522313252 is an abundant number, since it is smaller than the sum of its proper divisors (41095420380).

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

20522313252 is a wasteful number, since it uses less digits than its factorization.

20522313252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660 (or 6646 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 20522313252 its reverse (25231322502), we get a palindrome (45753635754).

The spelling of 20522313252 in words is "twenty billion, five hundred twenty-two million, three hundred thirteen thousand, two hundred fifty-two".