19054815078 has 64 divisors (see below), whose sum is σ = 41621594112. Its totient is φ = 5780678400.

The previous prime is 19054815077. The next prime is 19054815079. The reversal of 19054815078 is 87051845091.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19054815077) and next prime (19054815079).

It is a super-2 number, since 2×19054815078² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19054815071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1608778 + ... + 1620578.

It is an arithmetic number, because the mean of its divisors is an integer number (650337408).

Almost surely, 2^19054815078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19054815078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20810797056).

19054815078 is an abundant number, since it is smaller than the sum of its proper divisors (22566779034).

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

19054815078 is a wasteful number, since it uses less digits than its factorization.

19054815078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12109.

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 19054815078 in words is "nineteen billion, fifty-four million, eight hundred fifteen thousand, seventy-eight".