22180974797 has 2 divisors, whose sum is σ = 22180974798. Its totient is φ = 22180974796.

The previous prime is 22180974793. The next prime is 22180974817. The reversal of 22180974797 is 79747908122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19381929961 + 2799044836 = 139219^2 + 52906^2 .

It is a cyclic number.

It is not a de Polignac number, because 22180974797 - 2² = 22180974793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22180974793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11090487398 + 11090487399.

It is an arithmetic number, because the mean of its divisors is an integer number (11090487399).

Almost surely, 2^22180974797 is an apocalyptic number.

It is an amenable number.

22180974797 is a deficient number, since it is larger than the sum of its proper divisors (1).

22180974797 is an equidigital number, since it uses as much as digits as its factorization.

22180974797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 22180974797 in words is "twenty-two billion, one hundred eighty million, nine hundred seventy-four thousand, seven hundred ninety-seven".