20906565412 has 24 divisors (see below), whose sum is σ = 38570450240. Its totient is φ = 9888104160.

The previous prime is 20906565403. The next prime is 20906565487. The reversal of 20906565412 is 21456560902.

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 7 ways as a sum of consecutive naturals, for example, 157848 + ... + 258319.

Almost surely, 2^20906565412 is an apocalyptic number.

It is an amenable number.

20906565412 is a deficient number, since it is larger than the sum of its proper divisors (17663884828).

20906565412 is a wasteful number, since it uses less digits than its factorization.

20906565412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416851 (or 416849 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 20906565412 in words is "twenty billion, nine hundred six million, five hundred sixty-five thousand, four hundred twelve".