20257909060488 has 128 divisors (see below), whose sum is σ = 55842010398720. Its totient is φ = 6072906332160.

The previous prime is 20257909060481. The next prime is 20257909060559. The reversal of 20257909060488 is 88406090975202.

It is not an unprimeable number, because it can be changed into a prime (20257909060481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60857881 + ... + 61189847.

It is an arithmetic number, because the mean of its divisors is an integer number (436265706240).

Almost surely, 2^{20257909060488} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20257909060488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27921005199360).

20257909060488 is an abundant number, since it is smaller than the sum of its proper divisors (35584101338232).

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

20257909060488 is a wasteful number, since it uses less digits than its factorization.

20257909060488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334467 (or 334463 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 20257909060488 in words is "twenty trillion, two hundred fifty-seven billion, nine hundred nine million, sixty thousand, four hundred eighty-eight".