20680134048 has 144 divisors (see below), whose sum is σ = 68582404800. Its totient is φ = 5908581504.

The previous prime is 20680134037. The next prime is 20680134127. The reversal of 20680134048 is 84043108602.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5890 + ... + 203457.

It is an arithmetic number, because the mean of its divisors is an integer number (476266700).

Almost surely, 2^20680134048 is an apocalyptic number.

20680134048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20680134048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34291202400).

20680134048 is an abundant number, since it is smaller than the sum of its proper divisors (47902270752).

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

20680134048 is a wasteful number, since it uses less digits than its factorization.

20680134048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209384 (or 209359 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 20680134048 in words is "twenty billion, six hundred eighty million, one hundred thirty-four thousand, forty-eight".