20473605 has 12 divisors (see below), whose sum is σ = 35487660. Its totient is φ = 10919232.

The previous prime is 20473601. The next prime is 20473667. The reversal of 20473605 is 50637402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10246401 + 10227204 = 3201^2 + 3198^2 .

It is not a de Polignac number, because 20473605 - 2² = 20473601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227440 + ... + 227529.

It is an arithmetic number, because the mean of its divisors is an integer number (2957305).

Almost surely, 2^20473605 is an apocalyptic number.

It is an amenable number.

20473605 is a deficient number, since it is larger than the sum of its proper divisors (15014055).

20473605 is a wasteful number, since it uses less digits than its factorization.

20473605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454980 (or 454977 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20473605 is about 4524.7767900748. The cubic root of 20473605 is about 273.5676711699.

The spelling of 20473605 in words is "twenty million, four hundred seventy-three thousand, six hundred five".