20475043 has 2 divisors, whose sum is σ = 20475044. Its totient is φ = 20475042.

The previous prime is 20475041. The next prime is 20475047. The reversal of 20475043 is 34057402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20475043 - 2¹ = 20475041 is a prime.

Together with 20475041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20474999 and 20475017.

It is not a weakly prime, because it can be changed into another prime (20475041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10237521 + 10237522.

It is an arithmetic number, because the mean of its divisors is an integer number (10237522).

Almost surely, 2^20475043 is an apocalyptic number.

20475043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20475043 is an equidigital number, since it uses as much as digits as its factorization.

20475043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20475043 is about 4524.9356901507. The cubic root of 20475043 is about 273.5740758570.

The spelling of 20475043 in words is "twenty million, four hundred seventy-five thousand, forty-three".