20011011011100 has 54 divisors (see below), whose sum is σ = 62723402294280. Its totient is φ = 5336269602720.

The previous prime is 20011011011087. The next prime is 20011011011111. The reversal of 20011011011100 is 111011011002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11117227440 + ... + 11117229239.

Almost surely, 2^{20011011011100} is an apocalyptic number.

20011011011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011011011100 is an abundant number, since it is smaller than the sum of its proper divisors (42712391283180).

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

20011011011100 is a wasteful number, since it uses less digits than its factorization.

20011011011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22234456699 (or 22234456689 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 20011011011100 its reverse (111011011002), we get a palindrome (20122022022102).

The spelling of 20011011011100 in words is "twenty trillion, eleven billion, eleven million, eleven thousand, one hundred".