20297980548 has 18 divisors (see below), whose sum is σ = 51308784254. Its totient is φ = 6765993504.

The previous prime is 20297980541. The next prime is 20297980597. The reversal of 20297980548 is 84508979202.

20297980548 is a `hidden beast` number, since 2 + 0 + 2 + 9 + 7 + 98 + 0 + 548 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12882704004 + 7415276544 = 113502^2 + 86112^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 20297980494 and 20297980503.

It is not an unprimeable number, because it can be changed into a prime (20297980541) 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, 281916361 + ... + 281916432.

Almost surely, 2^20297980548 is an apocalyptic number.

It is an amenable number.

20297980548 is an abundant number, since it is smaller than the sum of its proper divisors (31010803706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20297980548 is a wasteful number, since it uses less digits than its factorization.

20297980548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563832803 (or 563832798 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 20297980548 in words is "twenty billion, two hundred ninety-seven million, nine hundred eighty thousand, five hundred forty-eight".