19194540448 has 24 divisors (see below), whose sum is σ = 37839219012. Its totient is φ = 9584580096.

The previous prime is 19194540437. The next prime is 19194540457. The reversal of 19194540448 is 84404549191.

It can be written as a sum of positive squares in 2 ways, for example, as 19135742224 + 58798224 = 138332^2 + 7668^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371965 + ... + 420412.

Almost surely, 2^19194540448 is an apocalyptic number.

It is an amenable number.

19194540448 is a deficient number, since it is larger than the sum of its proper divisors (18644678564).

19194540448 is an equidigital number, since it uses as much as digits as its factorization.

19194540448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793144 (or 793136 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 19194540448 in words is "nineteen billion, one hundred ninety-four million, five hundred forty thousand, four hundred forty-eight".