19219669616 has 80 divisors (see below), whose sum is σ = 43115901120. Its totient is φ = 8129341440.

The previous prime is 19219669613. The next prime is 19219669643. The reversal of 19219669616 is 61696691291.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19219669613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6587390 + ... + 6590306.

It is an arithmetic number, because the mean of its divisors is an integer number (538948764).

Almost surely, 2^19219669616 is an apocalyptic number.

19219669616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19219669616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21557950560).

19219669616 is an abundant number, since it is smaller than the sum of its proper divisors (23896231504).

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

19219669616 is a wasteful number, since it uses less digits than its factorization.

19219669616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682 (or 3676 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 56.

The spelling of 19219669616 in words is "nineteen billion, two hundred nineteen million, six hundred sixty-nine thousand, six hundred sixteen".