20525550000 has 240 divisors, whose sum is σ = 66713542560. Its totient is φ = 5437440000.

The previous prime is 20525549999. The next prime is 20525550007. The reversal of 20525550000 is 5552502.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20525550007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28949646 + ... + 28950354.

It is an arithmetic number, because the mean of its divisors is an integer number (277973094).

Almost surely, 2^20525550000 is an apocalyptic number.

20525550000 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 20525550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33356771280).

20525550000 is an abundant number, since it is smaller than the sum of its proper divisors (46187992560).

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

20525550000 is an equidigital number, since it uses as much as digits as its factorization.

20525550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

It can be divided in two parts, 205255 and 50000, that added together give a triangular number (255255 = T₇₁₄).

The spelling of 20525550000 in words is "twenty billion, five hundred twenty-five million, five hundred fifty thousand".