20425013280 has 288 divisors, whose sum is σ = 79952116608. Its totient is φ = 4651315200.

The previous prime is 20425013269. The next prime is 20425013293. The reversal of 20425013280 is 8231052402.

20425013280 is a `hidden beast` number, since 204 + 250 + 132 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2828875 + ... + 2836085.

It is an arithmetic number, because the mean of its divisors is an integer number (277611516).

Almost surely, 2^20425013280 is an apocalyptic number.

20425013280 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 20425013280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39976058304).

20425013280 is an abundant number, since it is smaller than the sum of its proper divisors (59527103328).

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

20425013280 is a wasteful number, since it uses less digits than its factorization.

20425013280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7520 (or 7509 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20425013280 its reverse (8231052402), we get a palindrome (28656065682).

The spelling of 20425013280 in words is "twenty billion, four hundred twenty-five million, thirteen thousand, two hundred eighty".