22404493 has 2 divisors, whose sum is σ = 22404494. Its totient is φ = 22404492.

The previous prime is 22404469. The next prime is 22404497. The reversal of 22404493 is 39440422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 5774409 = 4078^2 + 2403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22404493 is a prime.

It is a super-2 number, since 2×22404493² = 1003922613174098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22404497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11202246 + 11202247.

It is an arithmetic number, because the mean of its divisors is an integer number (11202247).

Almost surely, 2^22404493 is an apocalyptic number.

It is an amenable number.

22404493 is a deficient number, since it is larger than the sum of its proper divisors (1).

22404493 is an equidigital number, since it uses as much as digits as its factorization.

22404493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 22404493 is about 4733.3384624385. The cubic root of 22404493 is about 281.9107953519.

The spelling of 22404493 in words is "twenty-two million, four hundred four thousand, four hundred ninety-three".