20791492608 has 68 divisors (see below), whose sum is σ = 55444081568. Its totient is φ = 6930432000.

The previous prime is 20791492607. The next prime is 20791492661. The reversal of 20791492608 is 80629419702.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20791492607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143733 + ... + 249483.

Almost surely, 2^20791492608 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 20791492608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27722040784).

20791492608 is an abundant number, since it is smaller than the sum of its proper divisors (34652588960).

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

20791492608 is an frugal number, since it uses more digits than its factorization.

20791492608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105786 (or 105756 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 20791492608 in words is "twenty billion, seven hundred ninety-one million, four hundred ninety-two thousand, six hundred eight".