19281918964 has 48 divisors (see below), whose sum is σ = 42088910976. Its totient is φ = 7508995200.

The previous prime is 19281918949. The next prime is 19281918983. The reversal of 19281918964 is 46981918291.

It is a junction number, because it is equal to n+sod(n) for n = 19281918899 and 19281918908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720202 + ... + 746494.

It is an arithmetic number, because the mean of its divisors is an integer number (876852312).

Almost surely, 2^19281918964 is an apocalyptic number.

19281918964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19281918964 is an abundant number, since it is smaller than the sum of its proper divisors (22806992012).

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

19281918964 is a wasteful number, since it uses less digits than its factorization.

19281918964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28696 (or 28694 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 58.

The spelling of 19281918964 in words is "nineteen billion, two hundred eighty-one million, nine hundred eighteen thousand, nine hundred sixty-four".