20473571 has 2 divisors, whose sum is σ = 20473572. Its totient is φ = 20473570.

The previous prime is 20473567. The next prime is 20473577. The reversal of 20473571 is 17537402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20473571 - 2² = 20473567 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20473577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236785 + 10236786.

It is an arithmetic number, because the mean of its divisors is an integer number (10236786).

Almost surely, 2^20473571 is an apocalyptic number.

20473571 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473571 is an equidigital number, since it uses as much as digits as its factorization.

20473571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20473571 is about 4524.7730329819. The cubic root of 20473571 is about 273.5675197342.

The spelling of 20473571 in words is "twenty million, four hundred seventy-three thousand, five hundred seventy-one".