19863872900 has 18 divisors (see below), whose sum is σ = 43104604410. Its totient is φ = 7945549120.

The previous prime is 19863872851. The next prime is 19863872911. The reversal of 19863872900 is 927836891.

It can be written as a sum of positive squares in 3 ways, for example, as 210076036 + 19653796864 = 14494^2 + 140192^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99319265 + ... + 99319464.

It is an arithmetic number, because the mean of its divisors is an integer number (2394700245).

Almost surely, 2^19863872900 is an apocalyptic number.

19863872900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19863872900 is an abundant number, since it is smaller than the sum of its proper divisors (23240731510).

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

19863872900 is a wasteful number, since it uses less digits than its factorization.

19863872900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198638743 (or 198638736 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 19863872900 in words is "nineteen billion, eight hundred sixty-three million, eight hundred seventy-two thousand, nine hundred".