20443151709 has 20 divisors (see below), whose sum is σ = 31866300576. Its totient is φ = 13036211496.

The previous prime is 20443151693. The next prime is 20443151747. The reversal of 20443151709 is 90715134402.

20443151709 is a `hidden beast` number, since 204 + 431 + 5 + 17 + 0 + 9 = 666.

It is not a de Polignac number, because 20443151709 - 2⁴ = 20443151693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443151809) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5484759 + ... + 5488484.

Almost surely, 2^20443151709 is an apocalyptic number.

It is an amenable number.

20443151709 is a deficient number, since it is larger than the sum of its proper divisors (11423148867).

20443151709 is a wasteful number, since it uses less digits than its factorization.

20443151709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10973278 (or 10973269 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 20443151709 in words is "twenty billion, four hundred forty-three million, one hundred fifty-one thousand, seven hundred nine".