20111110988 has 6 divisors (see below), whose sum is σ = 35194444236. Its totient is φ = 10055555492.

The previous prime is 20111110979. The next prime is 20111110991. The reversal of 20111110988 is 88901111102.

It is a super-2 number, since 2×20111110988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513888870 + ... + 2513888877.

It is an arithmetic number, because the mean of its divisors is an integer number (5865740706).

Almost surely, 2^20111110988 is an apocalyptic number.

It is an amenable number.

20111110988 is a deficient number, since it is larger than the sum of its proper divisors (15083333248).

20111110988 is a wasteful number, since it uses less digits than its factorization.

20111110988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027777751 (or 5027777749 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 32.

The spelling of 20111110988 in words is "twenty billion, one hundred eleven million, one hundred ten thousand, nine hundred eighty-eight".