19445497494 has 32 divisors (see below), whose sum is σ = 39523405920. Its totient is φ = 6376879872.

The previous prime is 19445497493. The next prime is 19445497529. The reversal of 19445497494 is 49479454491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19445497493) 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 15 ways as a sum of consecutive naturals, for example, 117972 + ... + 229800.

It is an arithmetic number, because the mean of its divisors is an integer number (1235106435).

Almost surely, 2^19445497494 is an apocalyptic number.

19445497494 is an abundant number, since it is smaller than the sum of its proper divisors (20077908426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19445497494 is a wasteful number, since it uses less digits than its factorization.

19445497494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112304.

The product of its digits is 26127360, while the sum is 60.

The spelling of 19445497494 in words is "nineteen billion, four hundred forty-five million, four hundred ninety-seven thousand, four hundred ninety-four".