20660248080 has 60 divisors (see below), whose sum is σ = 69384002220. Its totient is φ = 5509399296.

The previous prime is 20660248079. The next prime is 20660248129. The reversal of 20660248080 is 8084206602.

20660248080 is a `hidden beast` number, since 2 + 0 + 6 + 602 + 48 + 0 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8074100736 + 12586147344 = 89856^2 + 112188^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 14346675 + ... + 14348114.

It is an arithmetic number, because the mean of its divisors is an integer number (1156400037).

Almost surely, 2^20660248080 is an apocalyptic number.

20660248080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20660248080 is an abundant number, since it is smaller than the sum of its proper divisors (48723754140).

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

20660248080 is a wasteful number, since it uses less digits than its factorization.

20660248080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28694808 (or 28694799 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 20660248080 in words is "twenty billion, six hundred sixty million, two hundred forty-eight thousand, eighty".