20543716 has 12 divisors (see below), whose sum is σ = 37191420. Its totient is φ = 9917600.

The previous prime is 20543711. The next prime is 20543729. The reversal of 20543716 is 61734502.

It can be written as a sum of positive squares in 2 ways, for example, as 7001316 + 13542400 = 2646^2 + 3680^2 .

It is not an unprimeable number, because it can be changed into a prime (20543711) 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 in 3 ways as a sum of consecutive naturals, for example, 88435 + ... + 88666.

It is an arithmetic number, because the mean of its divisors is an integer number (3099285).

Almost surely, 2^20543716 is an apocalyptic number.

It is an amenable number.

20543716 is a deficient number, since it is larger than the sum of its proper divisors (16647704).

20543716 is a wasteful number, since it uses less digits than its factorization.

20543716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177134 (or 177132 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20543716 is about 4532.5176226905. The cubic root of 20543716 is about 273.8795890552.

The spelling of 20543716 in words is "twenty million, five hundred forty-three thousand, seven hundred sixteen".