21108224118 has 16 divisors (see below), whose sum is σ = 42634434096. Its totient is φ = 6966410400.

The previous prime is 21108224069. The next prime is 21108224177. The reversal of 21108224118 is 81142280112.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17415421 + ... + 17416632.

It is an arithmetic number, because the mean of its divisors is an integer number (2664652131).

Almost surely, 2^21108224118 is an apocalyptic number.

21108224118 is an abundant number, since it is smaller than the sum of its proper divisors (21526209978).

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

21108224118 is a wasteful number, since it uses less digits than its factorization.

21108224118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34832159.

The product of its (nonzero) digits is 2048, while the sum is 30.

It can be divided in two parts, 2110 and 8224118, that added together give a palindrome (8226228).

The spelling of 21108224118 in words is "twenty-one billion, one hundred eight million, two hundred twenty-four thousand, one hundred eighteen".