20525289720 has 256 divisors, whose sum is σ = 70307758080. Its totient is φ = 4756838400.

The previous prime is 20525289713. The next prime is 20525289739. The reversal of 20525289720 is 2798252502.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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 63 ways as a sum of consecutive naturals, for example, 1783585 + ... + 1795055.

It is an arithmetic number, because the mean of its divisors is an integer number (274639680).

Almost surely, 2^20525289720 is an apocalyptic number.

20525289720 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 20525289720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35153879040).

20525289720 is an abundant number, since it is smaller than the sum of its proper divisors (49782468360).

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

20525289720 is a wasteful number, since it uses less digits than its factorization.

20525289720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11566 (or 11562 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 20525289720 in words is "twenty billion, five hundred twenty-five million, two hundred eighty-nine thousand, seven hundred twenty".