22081812818 has 16 divisors (see below), whose sum is σ = 35677454400. Its totient is φ = 10189653456.

The previous prime is 22081812811. The next prime is 22081812827. The reversal of 22081812818 is 81821818022.

It is a super-2 number, since 2×22081812818² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22081812811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61721 + ... + 219027.

It is an arithmetic number, because the mean of its divisors is an integer number (2229840900).

Almost surely, 2^22081812818 is an apocalyptic number.

22081812818 is a deficient number, since it is larger than the sum of its proper divisors (13595641582).

22081812818 is a wasteful number, since it uses less digits than its factorization.

22081812818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162721.

The product of its (nonzero) digits is 32768, while the sum is 41.

The spelling of 22081812818 in words is "twenty-two billion, eighty-one million, eight hundred twelve thousand, eight hundred eighteen".