20660542485 has 48 divisors (see below), whose sum is σ = 36357824832. Its totient is φ = 10011006720.

The previous prime is 20660542453. The next prime is 20660542489. The reversal of 20660542485 is 58424506602.

It is a happy number.

It is not a de Polignac number, because 20660542485 - 2⁵ = 20660542453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660542489) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4486194 + ... + 4490796.

It is an arithmetic number, because the mean of its divisors is an integer number (757454684).

Almost surely, 2^20660542485 is an apocalyptic number.

It is an amenable number.

20660542485 is a deficient number, since it is larger than the sum of its proper divisors (15697282347).

20660542485 is a wasteful number, since it uses less digits than its factorization.

20660542485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106 (or 7095 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 20660542485 in words is "twenty billion, six hundred sixty million, five hundred forty-two thousand, four hundred eighty-five".