20909485248 has 56 divisors (see below), whose sum is σ = 55376185920. Its totient is φ = 6963129600.

The previous prime is 20909485241. The next prime is 20909485253. The reversal of 20909485248 is 84258490902.

It is a self number, because there is not a number n which added to its sum of digits gives 20909485248.

It is not an unprimeable number, because it can be changed into a prime (20909485241) 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 7 ways as a sum of consecutive naturals, for example, 149983 + ... + 253601.

Almost surely, 2^20909485248 is an apocalyptic number.

It is an amenable number.

20909485248 is an abundant number, since it is smaller than the sum of its proper divisors (34466700672).

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

20909485248 is a wasteful number, since it uses less digits than its factorization.

20909485248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104685 (or 104675 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 20909485248 in words is "twenty billion, nine hundred nine million, four hundred eighty-five thousand, two hundred forty-eight".