19141568840 has 16 divisors (see below), whose sum is σ = 43068529980. Its totient is φ = 7656627520.

The previous prime is 19141568839. The next prime is 19141568843. The reversal of 19141568840 is 4886514191.

It can be written as a sum of positive squares in 2 ways, for example, as 18889203844 + 252364996 = 137438^2 + 15886^2 .

It is not an unprimeable number, because it can be changed into a prime (19141568843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239269571 + ... + 239269650.

Almost surely, 2^19141568840 is an apocalyptic number.

19141568840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19141568840 is an abundant number, since it is smaller than the sum of its proper divisors (23926961140).

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

19141568840 is a wasteful number, since it uses less digits than its factorization.

19141568840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478539232 (or 478539228 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 19141568840 in words is "nineteen billion, one hundred forty-one million, five hundred sixty-eight thousand, eight hundred forty".