19222016778 has 24 divisors (see below), whose sum is σ = 42616255968. Its totient is φ = 6258330792.

The previous prime is 19222016747. The next prime is 19222016837. The reversal of 19222016778 is 87761022291.

It is a happy number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 12416550 + ... + 12418097.

It is an arithmetic number, because the mean of its divisors is an integer number (1775677332).

Almost surely, 2^19222016778 is an apocalyptic number.

19222016778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19222016778 is an abundant number, since it is smaller than the sum of its proper divisors (23394239190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19222016778 is a wasteful number, since it uses less digits than its factorization.

19222016778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24834698 (or 24834695 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 19222016778 in words is "nineteen billion, two hundred twenty-two million, sixteen thousand, seven hundred seventy-eight".