22218406787 has 2 divisors, whose sum is σ = 22218406788. Its totient is φ = 22218406786.

The previous prime is 22218406759. The next prime is 22218406813. The reversal of 22218406787 is 78760481222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22218406787 - 2⁸ = 22218406531 is a prime.

It is not a weakly prime, because it can be changed into another prime (22218436787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11109203393 + 11109203394.

It is an arithmetic number, because the mean of its divisors is an integer number (11109203394).

Almost surely, 2^22218406787 is an apocalyptic number.

22218406787 is a deficient number, since it is larger than the sum of its proper divisors (1).

22218406787 is an equidigital number, since it uses as much as digits as its factorization.

22218406787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 22218406787 in words is "twenty-two billion, two hundred eighteen million, four hundred six thousand, seven hundred eighty-seven".