19529241408 has 84 divisors (see below), whose sum is σ = 56024340580. Its totient is φ = 6504247296.

The previous prime is 19529241349. The next prime is 19529241437. The reversal of 19529241408 is 80414292591.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6686005824 + 12843235584 = 81768^2 + 113328^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698808 + ... + 726216.

Almost surely, 2^19529241408 is an apocalyptic number.

19529241408 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 19529241408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28012170290).

19529241408 is an abundant number, since it is smaller than the sum of its proper divisors (36495099172).

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

19529241408 is a wasteful number, since it uses less digits than its factorization.

19529241408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28664 (or 28651 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 19529241408 in words is "nineteen billion, five hundred twenty-nine million, two hundred forty-one thousand, four hundred eight".