19204554980 has 72 divisors (see below), whose sum is σ = 44735932584. Its totient is φ = 6917913600.

The previous prime is 19204554977. The next prime is 19204555057. The reversal of 19204554980 is 8945540291.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 10914816676 + 8289738304 = 104474^2 + 91048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69290 + ... + 207870.

It is an arithmetic number, because the mean of its divisors is an integer number (621332397).

Almost surely, 2^19204554980 is an apocalyptic number.

19204554980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 138580×138581.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19204554980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22367966292).

19204554980 is an abundant number, since it is smaller than the sum of its proper divisors (25531377604).

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

19204554980 is a wasteful number, since it uses less digits than its factorization.

19204554980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138657 (or 138642 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 19204554980 in words is "nineteen billion, two hundred four million, five hundred fifty-four thousand, nine hundred eighty".