19490018413 has 4 divisors (see below), whose sum is σ = 19490608800. Its totient is φ = 19489428028.

The previous prime is 19490018393. The next prime is 19490018473. The reversal of 19490018413 is 31481009491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19490018413 - 2⁵ = 19490018381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19490018473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242545 + ... + 312742.

It is an arithmetic number, because the mean of its divisors is an integer number (4872652200).

Almost surely, 2^19490018413 is an apocalyptic number.

It is an amenable number.

19490018413 is a deficient number, since it is larger than the sum of its proper divisors (590387).

19490018413 is an equidigital number, since it uses as much as digits as its factorization.

19490018413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590386.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 19490018413 in words is "nineteen billion, four hundred ninety million, eighteen thousand, four hundred thirteen".