22404021397 has 2 divisors, whose sum is σ = 22404021398. Its totient is φ = 22404021396.

The previous prime is 22404021373. The next prime is 22404021457. The reversal of 22404021397 is 79312040422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20335045201 + 2068976196 = 142601^2 + 45486^2 .

It is a cyclic number.

It is not a de Polignac number, because 22404021397 - 2¹¹ = 22404019349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22404021337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11202010698 + 11202010699.

It is an arithmetic number, because the mean of its divisors is an integer number (11202010699).

Almost surely, 2^22404021397 is an apocalyptic number.

It is an amenable number.

22404021397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22404021397 is an equidigital number, since it uses as much as digits as its factorization.

22404021397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 22404021397 in words is "twenty-two billion, four hundred four million, twenty-one thousand, three hundred ninety-seven".