20522121550 has 96 divisors (see below), whose sum is σ = 44977746240. Its totient is φ = 6820070400.

The previous prime is 20522121533. The next prime is 20522121553. The reversal of 20522121550 is 5512122502.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522121553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2248396 + ... + 2257504.

It is an arithmetic number, because the mean of its divisors is an integer number (468518190).

Almost surely, 2^20522121550 is an apocalyptic number.

20522121550 is an abundant number, since it is smaller than the sum of its proper divisors (24455624690).

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

20522121550 is a wasteful number, since it uses less digits than its factorization.

20522121550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326 (or 9321 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 20522121550 in words is "twenty billion, five hundred twenty-two million, one hundred twenty-one thousand, five hundred fifty".