20894183684 has 18 divisors (see below), whose sum is σ = 40191085662. Its totient is φ = 9497356000.

The previous prime is 20894183683. The next prime is 20894183767. The reversal of 20894183684 is 48638149802.

It can be written as a sum of positive squares in only one way, i.e., 15863402500 + 5030781184 = 125950^2 + 70928^2 .

It is not an unprimeable number, because it can be changed into a prime (20894183683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21584417 + ... + 21585384.

Almost surely, 2^20894183684 is an apocalyptic number.

It is an amenable number.

20894183684 is a deficient number, since it is larger than the sum of its proper divisors (19296901978).

20894183684 is a wasteful number, since it uses less digits than its factorization.

20894183684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43169827 (or 43169814 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 53.

The spelling of 20894183684 in words is "twenty billion, eight hundred ninety-four million, one hundred eighty-three thousand, six hundred eighty-four".