19022987 has 2 divisors, whose sum is σ = 19022988. Its totient is φ = 19022986.

The previous prime is 19022953. The next prime is 19023013. The reversal of 19022987 is 78922091.

It is a strong prime.

It is an emirp because it is prime and its reverse (78922091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19022987 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 19022987.

It is not a weakly prime, because it can be changed into another prime (19022917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9511493 + 9511494.

It is an arithmetic number, because the mean of its divisors is an integer number (9511494).

Almost surely, 2^19022987 is an apocalyptic number.

19022987 is a deficient number, since it is larger than the sum of its proper divisors (1).

19022987 is an equidigital number, since it uses as much as digits as its factorization.

19022987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 19022987 is about 4361.5349362352. The cubic root of 19022987 is about 266.9477329926.

The spelling of 19022987 in words is "nineteen million, twenty-two thousand, nine hundred eighty-seven".