19681402800 has 60 divisors (see below), whose sum is σ = 63046097480. Its totient is φ = 5248373760.

The previous prime is 19681402789. The next prime is 19681402801. The reversal of 19681402800 is 820418691.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (19681402801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8199385 + ... + 8201784.

Almost surely, 2^19681402800 is an apocalyptic number.

19681402800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19681402800 is an abundant number, since it is smaller than the sum of its proper divisors (43364694680).

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

19681402800 is a wasteful number, since it uses less digits than its factorization.

19681402800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16401190 (or 16401179 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 19681402800 in words is "nineteen billion, six hundred eighty-one million, four hundred two thousand, eight hundred".