22085507681 has 8 divisors (see below), whose sum is σ = 23020959360. Its totient is φ = 21167874288.

The previous prime is 22085507659. The next prime is 22085507711. The reversal of 22085507681 is 18670558022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22085507681 - 2¹⁸ = 22085245537 is a prime.

It is a super-2 number, since 2×22085507681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22085507581) 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, 4452041 + ... + 4456998.

It is an arithmetic number, because the mean of its divisors is an integer number (2877619920).

Almost surely, 2^22085507681 is an apocalyptic number.

It is an amenable number.

22085507681 is a deficient number, since it is larger than the sum of its proper divisors (935451679).

22085507681 is an equidigital number, since it uses as much as digits as its factorization.

22085507681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8909143.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 22085507681 in words is "twenty-two billion, eighty-five million, five hundred seven thousand, six hundred eighty-one".