20522453200 has 120 divisors (see below), whose sum is σ = 51175441080. Its totient is φ = 7899494400.

The previous prime is 20522453191. The next prime is 20522453219. The reversal of 20522453200 is 235422502.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 12403722384 + 8118730816 = 111372^2 + 90104^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3674410 + ... + 3679990.

It is an arithmetic number, because the mean of its divisors is an integer number (426462009).

Almost surely, 2^20522453200 is an apocalyptic number.

20522453200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20522453200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25587720540).

20522453200 is an abundant number, since it is smaller than the sum of its proper divisors (30652987880).

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

20522453200 is a wasteful number, since it uses less digits than its factorization.

20522453200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945 (or 5934 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20522453200 its reverse (235422502), we get a palindrome (20757875702).

The spelling of 20522453200 in words is "twenty billion, five hundred twenty-two million, four hundred fifty-three thousand, two hundred".