22057750681 has 4 divisors (see below), whose sum is σ = 22058110672. Its totient is φ = 22057390692.

The previous prime is 22057750643. The next prime is 22057750703. The reversal of 22057750681 is 18605775022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18605775022 = 2 ⋅9302887511.

It is a cyclic number.

It is not a de Polignac number, because 22057750681 - 2¹⁷ = 22057619609 is a prime.

It is a super-2 number, since 2×22057750681² (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 (22057750081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62535 + ... + 219148.

It is an arithmetic number, because the mean of its divisors is an integer number (5514527668).

Almost surely, 2^22057750681 is an apocalyptic number.

It is an amenable number.

22057750681 is a deficient number, since it is larger than the sum of its proper divisors (359991).

22057750681 is an equidigital number, since it uses as much as digits as its factorization.

22057750681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359990.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 22057750681 in words is "twenty-two billion, fifty-seven million, seven hundred fifty thousand, six hundred eighty-one".