19494503111 has 4 divisors (see below), whose sum is σ = 19785465912. Its totient is φ = 19203540312.

The previous prime is 19494503071. The next prime is 19494503141. The reversal of 19494503111 is 11130549491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11130549491 = 1621 ⋅6866471.

It is a cyclic number.

It is not a de Polignac number, because 19494503111 - 2¹⁸ = 19494240967 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 (19494503141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145481300 + ... + 145481433.

It is an arithmetic number, because the mean of its divisors is an integer number (4946366478).

Almost surely, 2^19494503111 is an apocalyptic number.

19494503111 is a deficient number, since it is larger than the sum of its proper divisors (290962801).

19494503111 is an equidigital number, since it uses as much as digits as its factorization.

19494503111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290962800.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 19494503111 in words is "nineteen billion, four hundred ninety-four million, five hundred three thousand, one hundred eleven".