20330525520 has 120 divisors (see below), whose sum is σ = 68735277000. Its totient is φ = 5385059328.

The previous prime is 20330525497. The next prime is 20330525549. The reversal of 20330525520 is 2552503302.

It can be written as a sum of positive squares in 4 ways, for example, as 773062416 + 19557463104 = 27804^2 + 139848^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12526 + ... + 202034.

It is an arithmetic number, because the mean of its divisors is an integer number (572793975).

Almost surely, 2^20330525520 is an apocalyptic number.

20330525520 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 20330525520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34367638500).

20330525520 is an abundant number, since it is smaller than the sum of its proper divisors (48404751480).

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

20330525520 is a wasteful number, since it uses less digits than its factorization.

20330525520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189677 (or 189668 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The spelling of 20330525520 in words is "twenty billion, three hundred thirty million, five hundred twenty-five thousand, five hundred twenty".