19419965880 has 128 divisors (see below), whose sum is σ = 66610874880. Its totient is φ = 4436974080.

The previous prime is 19419965863. The next prime is 19419965881. The reversal of 19419965880 is 8856991491.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19419965881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3379810 + ... + 3385550.

It is an arithmetic number, because the mean of its divisors is an integer number (520397460).

Almost surely, 2^19419965880 is an apocalyptic number.

19419965880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19419965880 is an abundant number, since it is smaller than the sum of its proper divisors (47190909000).

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

19419965880 is a wasteful number, since it uses less digits than its factorization.

19419965880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9789 (or 9785 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 60.

The spelling of 19419965880 in words is "nineteen billion, four hundred nineteen million, nine hundred sixty-five thousand, eight hundred eighty".