20112111108 has 30 divisors (see below), whose sum is σ = 52577032046. Its totient is φ = 6704036928.

The previous prime is 20112110989. The next prime is 20112111109. The reversal of 20112111108 is 80111121102.

It can be written as a sum of positive squares in only one way, i.e., 19717214724 + 394896384 = 140418^2 + 19872^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20112111109) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 31036885 + ... + 31037532.

Almost surely, 2^20112111108 is an apocalyptic number.

It is an amenable number.

20112111108 is an abundant number, since it is smaller than the sum of its proper divisors (32464920938).

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

20112111108 is a wasteful number, since it uses less digits than its factorization.

20112111108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62074433 (or 62074422 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

The spelling of 20112111108 in words is "twenty billion, one hundred twelve million, one hundred eleven thousand, one hundred eight".