20881080000 has 420 divisors, whose sum is σ = 81605509128. Its totient is φ = 5061120000.

The previous prime is 20881079987. The next prime is 20881080013. The reversal of 20881080000 is 8018802.

It is an interprime number because it is at equal distance from previous prime (20881079987) and next prime (20881080013).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3957364 + ... + 3962636.

Almost surely, 2^20881080000 is an apocalyptic number.

20881080000 is a gapful number since it is divisible by the number (20) 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 20881080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40802754564).

20881080000 is an abundant number, since it is smaller than the sum of its proper divisors (60724429128).

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

20881080000 is a wasteful number, since it uses less digits than its factorization.

20881080000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322 (or 5294 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

Adding to 20881080000 its reverse (8018802), we get a palindrome (20889098802).

The spelling of 20881080000 in words is "twenty billion, eight hundred eighty-one million, eighty thousand".