19493009494 has 32 divisors (see below), whose sum is σ = 33815771136. Its totient is φ = 8254687200.

The previous prime is 19493009447. The next prime is 19493009507. The reversal of 19493009494 is 49490039491.

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 15 ways as a sum of consecutive naturals, for example, 697539 + ... + 724945.

It is an arithmetic number, because the mean of its divisors is an integer number (1056742848).

Almost surely, 2^19493009494 is an apocalyptic number.

19493009494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19493009494 is a deficient number, since it is larger than the sum of its proper divisors (14322761642).

19493009494 is a wasteful number, since it uses less digits than its factorization.

19493009494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28020.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 19493009494 in words is "nineteen billion, four hundred ninety-three million, nine thousand, four hundred ninety-four".