20725382560 has 24 divisors (see below), whose sum is σ = 48963716676. Its totient is φ = 8290152960.

The previous prime is 20725382543. The next prime is 20725382569. The reversal of 20725382560 is 6528352702.

It can be written as a sum of positive squares in 2 ways, for example, as 18835915536 + 1889467024 = 137244^2 + 43468^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (20725382569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64766661 + ... + 64766980.

Almost surely, 2^20725382560 is an apocalyptic number.

20725382560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20725382560 is an abundant number, since it is smaller than the sum of its proper divisors (28238334116).

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

20725382560 is a wasteful number, since it uses less digits than its factorization.

20725382560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129533656 (or 129533648 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 20725382560 in words is "twenty billion, seven hundred twenty-five million, three hundred eighty-two thousand, five hundred sixty".