20011105612 has 12 divisors (see below), whose sum is σ = 35035274736. Its totient is φ = 10001027120.

The previous prime is 20011105591. The next prime is 20011105651. The reversal of 20011105612 is 21650111002.

It is a self number, because there is not a number n which added to its sum of digits gives 20011105612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121464 + ... + 1139167.

It is an arithmetic number, because the mean of its divisors is an integer number (2919606228).

Almost surely, 2^20011105612 is an apocalyptic number.

It is an amenable number.

20011105612 is a deficient number, since it is larger than the sum of its proper divisors (15024169124).

20011105612 is a wasteful number, since it uses less digits than its factorization.

20011105612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262848 (or 2262846 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 20011105612 its reverse (21650111002), we get a palindrome (41661216614).

The spelling of 20011105612 in words is "twenty billion, eleven million, one hundred five thousand, six hundred twelve".