19504522008 has 240 divisors, whose sum is σ = 60486675480. Its totient is φ = 5851270656.

The previous prime is 19504522001. The next prime is 19504522013. The reversal of 19504522008 is 80022540591.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19504522001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5825791 + ... + 5829137.

Almost surely, 2^19504522008 is an apocalyptic number.

19504522008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19504522008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30243337740).

19504522008 is an abundant number, since it is smaller than the sum of its proper divisors (40982153472).

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

19504522008 is a wasteful number, since it uses less digits than its factorization.

19504522008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 19504522008 in words is "nineteen billion, five hundred four million, five hundred twenty-two thousand, eight".