20522345004 has 240 divisors, whose sum is σ = 63000537600. Its totient is φ = 5704349184.

The previous prime is 20522344993. The next prime is 20522345017. The reversal of 20522345004 is 40054322502.

It is a happy number.

20522345004 is a `hidden beast` number, since 205 + 2 + 2 + 3 + 450 + 0 + 4 = 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 79 ways as a sum of consecutive naturals, for example, 13781892 + ... + 13783380.

It is an arithmetic number, because the mean of its divisors is an integer number (262502240).

Almost surely, 2^20522345004 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 20522345004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31500268800).

20522345004 is an abundant number, since it is smaller than the sum of its proper divisors (42478192596).

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

20522345004 is a wasteful number, since it uses less digits than its factorization.

20522345004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674 (or 1663 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 20522345004 its reverse (40054322502), we get a palindrome (60576667506).

The spelling of 20522345004 in words is "twenty billion, five hundred twenty-two million, three hundred forty-five thousand, four".