20675652443 has 4 divisors (see below), whose sum is σ = 20693160528. Its totient is φ = 20658144360.

The previous prime is 20675652391. The next prime is 20675652463. The reversal of 20675652443 is 34425657602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20675652443 - 2⁶ = 20675652379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20675652394 and 20675652403.

It is not an unprimeable number, because it can be changed into a prime (20675652463) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8752271 + ... + 8754632.

It is an arithmetic number, because the mean of its divisors is an integer number (5173290132).

Almost surely, 2^20675652443 is an apocalyptic number.

20675652443 is a deficient number, since it is larger than the sum of its proper divisors (17508085).

20675652443 is a wasteful number, since it uses less digits than its factorization.

20675652443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17508084.

The product of its (nonzero) digits is 1209600, while the sum is 44.

The spelling of 20675652443 in words is "twenty billion, six hundred seventy-five million, six hundred fifty-two thousand, four hundred forty-three".