19490134445 has 8 divisors (see below), whose sum is σ = 23390697336. Its totient is φ = 15590416896.

The previous prime is 19490134387. The next prime is 19490134523. The reversal of 19490134445 is 54443109491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6943222276 + 12546912169 = 83326^2 + 112013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19490134445 - 2²⁶ = 19423025581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19490134396 and 19490134405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159452 + ... + 253781.

It is an arithmetic number, because the mean of its divisors is an integer number (2923837167).

Almost surely, 2^19490134445 is an apocalyptic number.

It is an amenable number.

19490134445 is a deficient number, since it is larger than the sum of its proper divisors (3900562891).

19490134445 is an equidigital number, since it uses as much as digits as its factorization.

19490134445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422671.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 19490134445 in words is "nineteen billion, four hundred ninety million, one hundred thirty-four thousand, four hundred forty-five".