20798681088 has 78 divisors (see below), whose sum is σ = 55499037892. Its totient is φ = 6927564800.

The previous prime is 20798681081. The next prime is 20798681117. The reversal of 20798681088 is 88018689702.

It is not an unprimeable number, because it can be changed into a prime (20798681081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15986038 + ... + 15987338.

Almost surely, 2^20798681088 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 20798681088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27749518946).

20798681088 is an abundant number, since it is smaller than the sum of its proper divisors (34700356804).

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

20798681088 is an frugal number, since it uses more digits than its factorization.

20798681088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 57.

The spelling of 20798681088 in words is "twenty billion, seven hundred ninety-eight million, six hundred eighty-one thousand, eighty-eight".