19404778848 has 384 divisors, whose sum is σ = 65606123520. Its totient is φ = 4884572160.

The previous prime is 19404778829. The next prime is 19404778867. The reversal of 19404778848 is 84887740491.

It is an interprime number because it is at equal distance from previous prime (19404778829) and next prime (19404778867).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19404778791 and 19404778800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21394011 + ... + 21394917.

It is an arithmetic number, because the mean of its divisors is an integer number (170849280).

Almost surely, 2^19404778848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19404778848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32803061760).

19404778848 is an abundant number, since it is smaller than the sum of its proper divisors (46201344672).

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

19404778848 is a wasteful number, since it uses less digits than its factorization.

19404778848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 60.

It can be divided in two parts, 1940477 and 8848, that added together give a triangular number (1949325 = T₁₉₇₄).

The spelling of 19404778848 in words is "nineteen billion, four hundred four million, seven hundred seventy-eight thousand, eight hundred forty-eight".