19895785400 has 48 divisors (see below), whose sum is σ = 48692326200. Its totient is φ = 7539454080.

The previous prime is 19895785387. The next prime is 19895785453. The reversal of 19895785400 is 458759891.

It is a congruent number.

It is an unprimeable number.

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, 2614067 + ... + 2621666.

Almost surely, 2^19895785400 is an apocalyptic number.

19895785400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19895785400 is an abundant number, since it is smaller than the sum of its proper divisors (28796540800).

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

19895785400 is a wasteful number, since it uses less digits than its factorization.

19895785400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5235768 (or 5235759 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 19895785400 in words is "nineteen billion, eight hundred ninety-five million, seven hundred eighty-five thousand, four hundred".