20010668880 has 80 divisors (see below), whose sum is σ = 62180734464. Its totient is φ = 5323476480.

The previous prime is 20010668851. The next prime is 20010668891. The reversal of 20010668880 is 8886601002.

It is a tau number, because it is divible by the number of its divisors (80).

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, 2017 + ... + 200063.

Almost surely, 2^20010668880 is an apocalyptic number.

20010668880 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 20010668880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31090367232).

20010668880 is an abundant number, since it is smaller than the sum of its proper divisors (42170065584).

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

20010668880 is a wasteful number, since it uses less digits than its factorization.

20010668880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198484 (or 198478 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 20010668880 in words is "twenty billion, ten million, six hundred sixty-eight thousand, eight hundred eighty".