20660424876 has 432 divisors, whose sum is σ = 69225287040. Its totient is φ = 5141283840.

The previous prime is 20660424821. The next prime is 20660424893. The reversal of 20660424876 is 67842406602.

It is a nialpdrome in base 14.

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 143 ways as a sum of consecutive naturals, for example, 31255986 + ... + 31256646.

It is an arithmetic number, because the mean of its divisors is an integer number (160243720).

Almost surely, 2^20660424876 is an apocalyptic number.

20660424876 is a gapful number since it is divisible by the number (26) 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 20660424876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34612643520).

20660424876 is an abundant number, since it is smaller than the sum of its proper divisors (48564862164).

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

20660424876 is a wasteful number, since it uses less digits than its factorization.

20660424876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 20660424876 in words is "twenty billion, six hundred sixty million, four hundred twenty-four thousand, eight hundred seventy-six".