19771992200 has 96 divisors (see below), whose sum is σ = 47598620160. Its totient is φ = 7630156800.

The previous prime is 19771992161. The next prime is 19771992223. The reversal of 19771992200 is 229917791.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2084669 + ... + 2094131.

It is an arithmetic number, because the mean of its divisors is an integer number (495818960).

Almost surely, 2^19771992200 is an apocalyptic number.

19771992200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19771992200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23799310080).

19771992200 is an abundant number, since it is smaller than the sum of its proper divisors (27826627960).

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

19771992200 is a wasteful number, since it uses less digits than its factorization.

19771992200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9847 (or 9838 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 47.

The spelling of 19771992200 in words is "nineteen billion, seven hundred seventy-one million, nine hundred ninety-two thousand, two hundred".