19669393216 has 56 divisors (see below), whose sum is σ = 43485791616. Its totient is φ = 8750392320.

The previous prime is 19669393213. The next prime is 19669393279. The reversal of 19669393216 is 61239396691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19669393213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264141 + ... + 330316.

Almost surely, 2^19669393216 is an apocalyptic number.

19669393216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19669393216 is an abundant number, since it is smaller than the sum of its proper divisors (23816398400).

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

19669393216 is a wasteful number, since it uses less digits than its factorization.

19669393216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594527 (or 594517 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 55.

The spelling of 19669393216 in words is "nineteen billion, six hundred sixty-nine million, three hundred ninety-three thousand, two hundred sixteen".