20881804496 has 80 divisors (see below), whose sum is σ = 48150608640. Its totient is φ = 8583321600.

The previous prime is 20881804477. The next prime is 20881804501. The reversal of 20881804496 is 69440818802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469160 + ... + 511736.

It is an arithmetic number, because the mean of its divisors is an integer number (601882608).

Almost surely, 2^20881804496 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 20881804496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24075304320).

20881804496 is an abundant number, since it is smaller than the sum of its proper divisors (27268804144).

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

20881804496 is a wasteful number, since it uses less digits than its factorization.

20881804496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42772 (or 42766 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 20881804496 in words is "twenty billion, eight hundred eighty-one million, eight hundred four thousand, four hundred ninety-six".