20047316 has 6 divisors (see below), whose sum is σ = 35082810. Its totient is φ = 10023656.

The previous prime is 20047289. The next prime is 20047327. The reversal of 20047316 is 61374002.

It can be written as a sum of positive squares in only one way, i.e., 19324816 + 722500 = 4396^2 + 850^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20047291 and 20047300.

It is a congruent number.

It is an unprimeable number.

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, 2505911 + ... + 2505918.

It is an arithmetic number, because the mean of its divisors is an integer number (5847135).

Almost surely, 2^20047316 is an apocalyptic number.

It is an amenable number.

20047316 is a deficient number, since it is larger than the sum of its proper divisors (15035494).

20047316 is a wasteful number, since it uses less digits than its factorization.

20047316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011833 (or 5011831 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20047316 is about 4477.4229194929. The cubic root of 20047316 is about 271.6556520473.

The spelling of 20047316 in words is "twenty million, forty-seven thousand, three hundred sixteen".