20011111000 has 64 divisors (see below), whose sum is σ = 47593784160. Its totient is φ = 7873200000.

The previous prime is 20011110971. The next prime is 20011111013. The reversal of 20011111000 is 11111002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103026 + ... + 225025.

Almost surely, 2^20011111000 is an apocalyptic number.

20011111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011111000 is an abundant number, since it is smaller than the sum of its proper divisors (27582673160).

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

20011111000 is a wasteful number, since it uses less digits than its factorization.

20011111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328133 (or 328119 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20011111000 its reverse (11111002), we get a palindrome (20022222002).

The spelling of 20011111000 in words is "twenty billion, eleven million, one hundred eleven thousand".