20475537443 has 4 divisors (see below), whose sum is σ = 21679980840. Its totient is φ = 19271094048.

The previous prime is 20475537437. The next prime is 20475537461. The reversal of 20475537443 is 34473557402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20475537443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20475537394 and 20475537403.

It is not an unprimeable number, because it can be changed into a prime (20475537143) 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 3 ways as a sum of consecutive naturals, for example, 602221673 + ... + 602221706.

It is an arithmetic number, because the mean of its divisors is an integer number (5419995210).

Almost surely, 2^20475537443 is an apocalyptic number.

20475537443 is a deficient number, since it is larger than the sum of its proper divisors (1204443397).

20475537443 is a wasteful number, since it uses less digits than its factorization.

20475537443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204443396.

The product of its (nonzero) digits is 1411200, while the sum is 44.

The spelling of 20475537443 in words is "twenty billion, four hundred seventy-five million, five hundred thirty-seven thousand, four hundred forty-three".