19460319778 has 16 divisors (see below), whose sum is σ = 29672080704. Its totient is φ = 9570076560.

The previous prime is 19460319763. The next prime is 19460319833. The reversal of 19460319778 is 87791306491.

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 7 ways as a sum of consecutive naturals, for example, 25533 + ... + 198928.

It is an arithmetic number, because the mean of its divisors is an integer number (1854505044).

Almost surely, 2^19460319778 is an apocalyptic number.

19460319778 is a deficient number, since it is larger than the sum of its proper divisors (10211760926).

19460319778 is a wasteful number, since it uses less digits than its factorization.

19460319778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225177.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 19460319778 in words is "nineteen billion, four hundred sixty million, three hundred nineteen thousand, seven hundred seventy-eight".