20545516424 has 8 divisors (see below), whose sum is σ = 38522843310. Its totient is φ = 10272758208.

The previous prime is 20545516423. The next prime is 20545516451. The reversal of 20545516424 is 42461554502.

It can be written as a sum of positive squares in only one way, i.e., 17252822500 + 3292693924 = 131350^2 + 57382^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20545516423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284094769 + ... + 1284094784.

Almost surely, 2^20545516424 is an apocalyptic number.

It is an amenable number.

20545516424 is a deficient number, since it is larger than the sum of its proper divisors (17977326886).

20545516424 is a wasteful number, since it uses less digits than its factorization.

20545516424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568189559 (or 2568189555 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

The spelling of 20545516424 in words is "twenty billion, five hundred forty-five million, five hundred sixteen thousand, four hundred twenty-four".