22118015900 has 72 divisors (see below), whose sum is σ = 50555930880. Its totient is φ = 8375970240.

The previous prime is 22118015891. The next prime is 22118015981. The reversal of 22118015900 is 951081122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3848429 + ... + 3854171.

Almost surely, 2^22118015900 is an apocalyptic number.

22118015900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22118015900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25277965440).

22118015900 is an abundant number, since it is smaller than the sum of its proper divisors (28437914980).

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

22118015900 is a wasteful number, since it uses less digits than its factorization.

22118015900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803 (or 7796 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 22118015900 in words is "twenty-two billion, one hundred eighteen million, fifteen thousand, nine hundred".