11000020019980 has 24 divisors (see below), whose sum is σ = 23100872745888. Its totient is φ = 4399849778688.

The previous prime is 11000020019971. The next prime is 11000020019981. The reversal of 11000020019980 is 8991002000011.

It is not an unprimeable number, because it can be changed into a prime (11000020019981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9318469 + ... + 10432348.

It is an arithmetic number, because the mean of its divisors is an integer number (962536364412).

Almost surely, 2^{11000020019980} is an apocalyptic number.

11000020019980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11000020019980 is an abundant number, since it is smaller than the sum of its proper divisors (12100852725908).

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

11000020019980 is a wasteful number, since it uses less digits than its factorization.

11000020019980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19778673 (or 19778671 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 31.

Adding to 11000020019980 its reverse (8991002000011), we get a palindrome (19991022019991).

The spelling of 11000020019980 in words is "eleven trillion, twenty million, nineteen thousand, nine hundred eighty".