19349678774 has 16 divisors (see below), whose sum is σ = 30612178800. Its totient is φ = 9147621024.

The previous prime is 19349678773. The next prime is 19349678791. The reversal of 19349678774 is 47787694391.

It is a super-2 number, since 2×19349678774² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19349678774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19349678773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480857 + ... + 519540.

It is an arithmetic number, because the mean of its divisors is an integer number (1913261175).

Almost surely, 2^19349678774 is an apocalyptic number.

19349678774 is a deficient number, since it is larger than the sum of its proper divisors (11262500026).

19349678774 is a wasteful number, since it uses less digits than its factorization.

19349678774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000927.

The product of its digits is 64012032, while the sum is 65.

The spelling of 19349678774 in words is "nineteen billion, three hundred forty-nine million, six hundred seventy-eight thousand, seven hundred seventy-four".