20471996 has 6 divisors (see below), whose sum is σ = 35826000. Its totient is φ = 10235996.

The previous prime is 20471977. The next prime is 20472007. The reversal of 20471996 is 69917402.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2558996 + ... + 2559003.

It is an arithmetic number, because the mean of its divisors is an integer number (5971000).

Almost surely, 2^20471996 is an apocalyptic number.

It is an amenable number.

20471996 is a deficient number, since it is larger than the sum of its proper divisors (15354004).

20471996 is a wasteful number, since it uses less digits than its factorization.

20471996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118003 (or 5118001 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20471996 is about 4524.5989877557. The cubic root of 20471996 is about 273.5605045129.

The spelling of 20471996 in words is "twenty million, four hundred seventy-one thousand, nine hundred ninety-six".