19870780807 has 8 divisors (see below), whose sum is σ = 20030769152. Its totient is φ = 19710847800.

The previous prime is 19870780789. The next prime is 19870780841. The reversal of 19870780807 is 70808707891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19870780807 - 2¹⁹ = 19870256519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19870780877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007632 + ... + 1027162.

It is an arithmetic number, because the mean of its divisors is an integer number (2503846144).

Almost surely, 2^19870780807 is an apocalyptic number.

19870780807 is a deficient number, since it is larger than the sum of its proper divisors (159988345).

19870780807 is a wasteful number, since it uses less digits than its factorization.

19870780807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27669.

The product of its (nonzero) digits is 1580544, while the sum is 55.

The spelling of 19870780807 in words is "nineteen billion, eight hundred seventy million, seven hundred eighty thousand, eight hundred seven".