19319994276 has 96 divisors (see below), whose sum is σ = 52868229120. Its totient is φ = 5428368000.

The previous prime is 19319994247. The next prime is 19319994277. The reversal of 19319994276 is 67249991391.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19319994277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35926 + ... + 199826.

It is an arithmetic number, because the mean of its divisors is an integer number (550710720).

Almost surely, 2^19319994276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19319994276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26434114560).

19319994276 is an abundant number, since it is smaller than the sum of its proper divisors (33548234844).

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

19319994276 is a wasteful number, since it uses less digits than its factorization.

19319994276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163985 (or 163983 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 60.

The spelling of 19319994276 in words is "nineteen billion, three hundred nineteen million, nine hundred ninety-four thousand, two hundred seventy-six".