20553500000 has 336 divisors, whose sum is σ = 57230829936. Its totient is φ = 7200000000.

The previous prime is 20553499961. The next prime is 20553500027. The reversal of 20553500000 is 535502.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 203499950 + ... + 203500050.

It is an arithmetic number, because the mean of its divisors is an integer number (170329851).

Almost surely, 2^20553500000 is an apocalyptic number.

20553500000 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 20553500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28615414968).

20553500000 is an abundant number, since it is smaller than the sum of its proper divisors (36677329936).

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

20553500000 is an equidigital number, since it uses as much as digits as its factorization.

20553500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The spelling of 20553500000 in words is "twenty billion, five hundred fifty-three million, five hundred thousand".