20618480884 has 6 divisors (see below), whose sum is σ = 36082341554. Its totient is φ = 10309240440.

The previous prime is 20618480867. The next prime is 20618480903. The reversal of 20618480884 is 48808481602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20056790884 + 561690000 = 141622^2 + 23700^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2577310107 + ... + 2577310114.

Almost surely, 2^20618480884 is an apocalyptic number.

It is an amenable number.

20618480884 is a deficient number, since it is larger than the sum of its proper divisors (15463860670).

20618480884 is a wasteful number, since it uses less digits than its factorization.

20618480884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154620225 (or 5154620223 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 49.

The spelling of 20618480884 in words is "twenty billion, six hundred eighteen million, four hundred eighty thousand, eight hundred eighty-four".