21066334612 has 6 divisors (see below), whose sum is σ = 36866085578. Its totient is φ = 10533167304.

The previous prime is 21066334573. The next prime is 21066334633. The reversal of 21066334612 is 21643366012.

It can be written as a sum of positive squares in only one way, i.e., 17952248196 + 3114086416 = 133986^2 + 55804^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2633291823 + ... + 2633291830.

Almost surely, 2^21066334612 is an apocalyptic number.

It is an amenable number.

21066334612 is a deficient number, since it is larger than the sum of its proper divisors (15799750966).

21066334612 is a wasteful number, since it uses less digits than its factorization.

21066334612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266583657 (or 5266583655 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 21066334612 in words is "twenty-one billion, sixty-six million, three hundred thirty-four thousand, six hundred twelve".