20473501 has 2 divisors, whose sum is σ = 20473502. Its totient is φ = 20473500.

The previous prime is 20473463. The next prime is 20473511. The reversal of 20473501 is 10537402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 2402500 = 4251^2 + 1550^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473501 - 2⁷ = 20473373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20473511) 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, 10236750 + 10236751.

It is an arithmetic number, because the mean of its divisors is an integer number (10236751).

Almost surely, 2^20473501 is an apocalyptic number.

It is an amenable number.

20473501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473501 is an equidigital number, since it uses as much as digits as its factorization.

20473501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20473501 is about 4524.7652977806. The cubic root of 20473501 is about 273.5672079542.

The spelling of 20473501 in words is "twenty million, four hundred seventy-three thousand, five hundred one".