22740787 has 2 divisors, whose sum is σ = 22740788. Its totient is φ = 22740786.

The previous prime is 22740761. The next prime is 22740793. The reversal of 22740787 is 78704722.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22740787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22740797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11370393 + 11370394.

It is an arithmetic number, because the mean of its divisors is an integer number (11370394).

Almost surely, 2^22740787 is an apocalyptic number.

22740787 is a deficient number, since it is larger than the sum of its proper divisors (1).

22740787 is an equidigital number, since it uses as much as digits as its factorization.

22740787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 22740787 is about 4768.7301244671. The cubic root of 22740787 is about 283.3143007592.

It can be divided in two parts, 227 and 40787, that added together give a palindrome (41014).

The spelling of 22740787 in words is "twenty-two million, seven hundred forty thousand, seven hundred eighty-seven".