22174654721 has 2 divisors, whose sum is σ = 22174654722. Its totient is φ = 22174654720.

The previous prime is 22174654651. The next prime is 22174654727. The reversal of 22174654721 is 12745647122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16272574096 + 5902080625 = 127564^2 + 76825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22174654721 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22174654727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11087327360 + 11087327361.

It is an arithmetic number, because the mean of its divisors is an integer number (11087327361).

Almost surely, 2^22174654721 is an apocalyptic number.

It is an amenable number.

22174654721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22174654721 is an equidigital number, since it uses as much as digits as its factorization.

22174654721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 41.

The spelling of 22174654721 in words is "twenty-two billion, one hundred seventy-four million, six hundred fifty-four thousand, seven hundred twenty-one".