19780275000 has 96 divisors (see below), whose sum is σ = 61809637680. Its totient is φ = 5274720000.

The previous prime is 19780274993. The next prime is 19780275101. The reversal of 19780275000 is 57208791.

It is a self number, because there is not a number n which added to its sum of digits gives 19780275000.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 56869 + ... + 206868.

Almost surely, 2^19780275000 is an apocalyptic number.

19780275000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19780275000 is an abundant number, since it is smaller than the sum of its proper divisors (42029362680).

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

19780275000 is an equidigital number, since it uses as much as digits as its factorization.

19780275000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263771 (or 263747 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The spelling of 19780275000 in words is "nineteen billion, seven hundred eighty million, two hundred seventy-five thousand".