20325486681 has 16 divisors (see below), whose sum is σ = 30114894400. Its totient is φ = 13548946464.

The previous prime is 20325486659. The next prime is 20325486689. The reversal of 20325486681 is 18668452302.

20325486681 is a `hidden beast` number, since 20 + 3 + 2 + 548 + 6 + 6 + 81 = 666.

It is not a de Polignac number, because 20325486681 - 2⁹ = 20325486169 is a prime.

It is a super-2 number, since 2×20325486681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20325486689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280365 + ... + 345333.

It is an arithmetic number, because the mean of its divisors is an integer number (1882180900).

Almost surely, 2^20325486681 is an apocalyptic number.

It is an amenable number.

20325486681 is a deficient number, since it is larger than the sum of its proper divisors (9789407719).

20325486681 is a wasteful number, since it uses less digits than its factorization.

20325486681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76565 (or 76559 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 20325486681 in words is "twenty billion, three hundred twenty-five million, four hundred eighty-six thousand, six hundred eighty-one".