19649740216 has 16 divisors (see below), whose sum is σ = 36844750800. Its totient is φ = 9824473344.

The previous prime is 19649740189. The next prime is 19649740247. The reversal of 19649740216 is 61204794691.

It is a super-2 number, since 2×19649740216² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19649740216.

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 3 ways as a sum of consecutive naturals, for example, 355965 + ... + 407443.

It is an arithmetic number, because the mean of its divisors is an integer number (2302796925).

Almost surely, 2^19649740216 is an apocalyptic number.

It is an amenable number.

19649740216 is a deficient number, since it is larger than the sum of its proper divisors (17195010584).

19649740216 is a wasteful number, since it uses less digits than its factorization.

19649740216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99198 (or 99194 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 19649740216 in words is "nineteen billion, six hundred forty-nine million, seven hundred forty thousand, two hundred sixteen".