19648537207 has 4 divisors (see below), whose sum is σ = 21159963160. Its totient is φ = 18137111256.

The previous prime is 19648537163. The next prime is 19648537217. The reversal of 19648537207 is 70273584691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19648537207 - 2¹⁵ = 19648504439 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 (19648537217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 755712957 + ... + 755712982.

It is an arithmetic number, because the mean of its divisors is an integer number (5289990790).

It is a 1-persistent number, because it is pandigital, but 2⋅19648537207 = 39297074414 is not.

Almost surely, 2^19648537207 is an apocalyptic number.

19648537207 is a deficient number, since it is larger than the sum of its proper divisors (1511425953).

19648537207 is a wasteful number, since it uses less digits than its factorization.

19648537207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511425952.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 19648537207 in words is "nineteen billion, six hundred forty-eight million, five hundred thirty-seven thousand, two hundred seven".