19647242260 has 12 divisors (see below), whose sum is σ = 41259208788. Its totient is φ = 7858896896.

The previous prime is 19647242231. The next prime is 19647242287. The reversal of 19647242260 is 6224274691.

It can be written as a sum of positive squares in 2 ways, for example, as 12607696656 + 7039545604 = 112284^2 + 83902^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491181037 + ... + 491181076.

It is an arithmetic number, because the mean of its divisors is an integer number (3438267399).

Almost surely, 2^19647242260 is an apocalyptic number.

19647242260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19647242260 is an abundant number, since it is smaller than the sum of its proper divisors (21611966528).

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

19647242260 is a wasteful number, since it uses less digits than its factorization.

19647242260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982362122 (or 982362120 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 19647242260 in words is "nineteen billion, six hundred forty-seven million, two hundred forty-two thousand, two hundred sixty".