19220087 has 2 divisors, whose sum is σ = 19220088. Its totient is φ = 19220086.

The previous prime is 19220083. The next prime is 19220099. The reversal of 19220087 is 78002291.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78002291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19220087 - 2² = 19220083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19220083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9610043 + 9610044.

It is an arithmetic number, because the mean of its divisors is an integer number (9610044).

Almost surely, 2^19220087 is an apocalyptic number.

19220087 is a deficient number, since it is larger than the sum of its proper divisors (1).

19220087 is an equidigital number, since it uses as much as digits as its factorization.

19220087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 19220087 is about 4384.0719656502. The cubic root of 19220087 is about 267.8665287344.

The spelling of 19220087 in words is "nineteen million, two hundred twenty thousand, eighty-seven".