20666337612 has 48 divisors (see below), whose sum is σ = 49812682752. Its totient is φ = 6661779840.

The previous prime is 20666337607. The next prime is 20666337673. The reversal of 20666337612 is 21673366602.

It is an unprimeable number.

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, 519088 + ... + 557480.

It is an arithmetic number, because the mean of its divisors is an integer number (1037764224).

Almost surely, 2^20666337612 is an apocalyptic number.

It is an amenable number.

20666337612 is an abundant number, since it is smaller than the sum of its proper divisors (29146345140).

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

20666337612 is a wasteful number, since it uses less digits than its factorization.

20666337612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39878 (or 39876 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The spelling of 20666337612 in words is "twenty billion, six hundred sixty-six million, three hundred thirty-seven thousand, six hundred twelve".