22543019987 has 2 divisors, whose sum is σ = 22543019988. Its totient is φ = 22543019986.

The previous prime is 22543019971. The next prime is 22543020013. The reversal of 22543019987 is 78991034522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22543019987 - 2⁴ = 22543019971 is a prime.

It is not a weakly prime, because it can be changed into another prime (22543019087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11271509993 + 11271509994.

It is an arithmetic number, because the mean of its divisors is an integer number (11271509994).

Almost surely, 2^22543019987 is an apocalyptic number.

22543019987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22543019987 is an equidigital number, since it uses as much as digits as its factorization.

22543019987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 22543019987 in words is "twenty-two billion, five hundred forty-three million, nineteen thousand, nine hundred eighty-seven".