22400423 has 2 divisors, whose sum is σ = 22400424. Its totient is φ = 22400422.

The previous prime is 22400419. The next prime is 22400431. The reversal of 22400423 is 32400422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22400423 - 2² = 22400419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22400453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11200211 + 11200212.

It is an arithmetic number, because the mean of its divisors is an integer number (11200212).

Almost surely, 2^22400423 is an apocalyptic number.

22400423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22400423 is an equidigital number, since it uses as much as digits as its factorization.

22400423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22400423 is about 4732.9085137999. The cubic root of 22400423 is about 281.8937236806.

Adding to 22400423 its reverse (32400422), we get a palindrome (54800845).

Subtracting 22400423 from its reverse (32400422), we obtain a palindrome (9999999).

The spelling of 22400423 in words is "twenty-two million, four hundred thousand, four hundred twenty-three".