19016343844 has 6 divisors (see below), whose sum is σ = 33278601734. Its totient is φ = 9508171920.

The previous prime is 19016343839. The next prime is 19016343851. The reversal of 19016343844 is 44834361091.

It can be written as a sum of positive squares in only one way, i.e., 18455222500 + 561121344 = 135850^2 + 23688^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19016343844.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2377042977 + ... + 2377042984.

Almost surely, 2^19016343844 is an apocalyptic number.

It is an amenable number.

19016343844 is a deficient number, since it is larger than the sum of its proper divisors (14262257890).

19016343844 is a wasteful number, since it uses less digits than its factorization.

19016343844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754085965 (or 4754085963 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 19016343844 in words is "nineteen billion, sixteen million, three hundred forty-three thousand, eight hundred forty-four".