22357493 has 2 divisors, whose sum is σ = 22357494. Its totient is φ = 22357492.

The previous prime is 22357487. The next prime is 22357523. The reversal of 22357493 is 39475322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22259524 + 97969 = 4718^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 22357493 - 2⁶ = 22357429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22357453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11178746 + 11178747.

It is an arithmetic number, because the mean of its divisors is an integer number (11178747).

Almost surely, 2^22357493 is an apocalyptic number.

It is an amenable number.

22357493 is a deficient number, since it is larger than the sum of its proper divisors (1).

22357493 is an equidigital number, since it uses as much as digits as its factorization.

22357493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 22357493 is about 4728.3710725788. The cubic root of 22357493 is about 281.7135271326.

The spelling of 22357493 in words is "twenty-two million, three hundred fifty-seven thousand, four hundred ninety-three".