19780852800 has 84 divisors (see below), whose sum is σ = 64897696976. Its totient is φ = 5274892800.

The previous prime is 19780852789. The next prime is 19780852807. The reversal of 19780852800 is 825808791.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 19780852800.

It is not an unprimeable number, because it can be changed into a prime (19780852807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2055706 + ... + 2065305.

Almost surely, 2^19780852800 is an apocalyptic number.

19780852800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19780852800 is an abundant number, since it is smaller than the sum of its proper divisors (45116844176).

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

19780852800 is a wasteful number, since it uses less digits than its factorization.

19780852800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121036 (or 4121021 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 19780852800 in words is "nineteen billion, seven hundred eighty million, eight hundred fifty-two thousand, eight hundred".