20471336 has 8 divisors (see below), whose sum is σ = 38383770. Its totient is φ = 10235664.

The previous prime is 20471327. The next prime is 20471389. The reversal of 20471336 is 63317402.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 9647236 = 3290^2 + 3106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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, 1279451 + ... + 1279466.

Almost surely, 2^20471336 is an apocalyptic number.

It is an amenable number.

20471336 is a deficient number, since it is larger than the sum of its proper divisors (17912434).

20471336 is a wasteful number, since it uses less digits than its factorization.

20471336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558923 (or 2558919 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20471336 is about 4524.5260525275. The cubic root of 20471336 is about 273.5575646941.

Adding to 20471336 its reverse (63317402), we get a palindrome (83788738).

The spelling of 20471336 in words is "twenty million, four hundred seventy-one thousand, three hundred thirty-six".