20766281912 has 16 divisors (see below), whose sum is σ = 39429650400. Its totient is φ = 10251708480.

The previous prime is 20766281909. The next prime is 20766281917. The reversal of 20766281912 is 21918266702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766281917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16428389 + ... + 16429652.

It is an arithmetic number, because the mean of its divisors is an integer number (2464353150).

Almost surely, 2^20766281912 is an apocalyptic number.

It is an amenable number.

20766281912 is a deficient number, since it is larger than the sum of its proper divisors (18663368488).

20766281912 is a wasteful number, since it uses less digits than its factorization.

20766281912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32858126 (or 32858122 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 20766281912 in words is "twenty billion, seven hundred sixty-six million, two hundred eighty-one thousand, nine hundred twelve".